essay on science class 9th

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The Best Wonder of Science Essay for class 10th, 9th students

The wonder of Science Essay in english: The world is filled with an overload of mysteries, and science is the tool we use to uncover them. From the vastness of space to the inner workings of our bodies, science helps us to better understand the wonders of the universe. From the latest developments in medical research to the latest discoveries in the field of astronomy, science has something to offer us all.

In this article, we will explore short and long essays on the wonders of science, and gain a deeper understanding of the way our world works. So, join us on this journey of discovery and uncovering the magic of science and learn more about The Wonders of Science Essay.

Wonder of science 10th class Essay:

This is a detailed essay on the Wonder of Science 10th class. If you read in class 8 or above, you can use this.

Introduction:

The world around us is full of phenomena, events, and objects that can be studied and explored to gain a better understanding of how the universe works. One way to do this is through the study of science. Science involves the systematic study of the structure and behavior of the physical and natural world through observation and experiment. It has revolutionized our lives and transformed the way we understand and interact with the world. In this essay, we will explore the wonders of science and how it has impacted our lives in countless ways.

What is Science?

Science is the systematic study of the physical and natural world through observation and experiment. It is based on the scientific method, which is a process of forming and testing hypotheses to gain an understanding of the world around us. The scientific method involves making observations, forming a hypothesis, testing the hypothesis, and then forming a conclusion based on the results of the experiments. It is this process that has allowed us to gain a better understanding of the world around us and make advancements in technology and medicine.

Contributions of Science:

Science has made countless contributions to our lives. From the invention of the wheel to the development of antibiotics, science has helped us create a better world. Here are some of the major contributions of science:

• Technology: The invention of the wheel, the discovery of electricity, and the development of computers have all been made possible through scientific advancement. Technology has made our lives more efficient and convenient and has enabled us to explore new avenues of exploration.
• Medicine: Science has allowed us to understand the body and its processes. This has enabled us to develop treatments and cures for diseases and ailments, greatly improving the quality of life for countless people.
• Agriculture: Science has enabled us to understand the processes involved in agriculture, from planting and harvesting to storage and distribution. This has allowed us to produce more food and feed more people, reducing hunger around the world.
• Environment: Science has enabled us to understand the environment and its processes. This has allowed us to develop ways to conserve energy and protect our planet from further damage.

Benefits of Science:

Science has brought countless benefits to our lives. Here are some of the major benefits of science:

• Increased Knowledge: Science has allowed us to gain a greater understanding of the world around us, which has enabled us to make more informed decisions.
• Improved Quality of Life: Science has enabled us to improve the quality of life for countless people around the world. From improved healthcare to better nutrition, science has allowed us to live healthier and longer lives.
• Innovation: Science has enabled us to explore new avenues of exploration and to develop new technologies that have revolutionized our lives.
• Conservation: Science has enabled us to understand the environment and its processes, which has allowed us to develop ways to conserve energy and protect our planet from further damage.

Conclusion:

From the invention of the wheel to the development of antibiotics, science has revolutionized our lives and transformed the way we understand and interact with the world. It has brought innumerable benefits to our lives, from increased knowledge to improved quality of life. The wonders of science are truly awe-inspiring and it is hard to imagine where we would be without it. Science has enabled us to explore new avenues of exploration, develop new technologies, conserve energy and protect our planet. It is a testament to humanity’s ingenuity and creativity and is a source of constant amazement and awe.

Wonder of science class 9th:

Wonder of Science essay for class 9th: Science has been a major source of wonder and fascination for humankind since the dawn of time. From ancient times, scientists and philosophers have sought to unravel the mysteries of the natural world. In the modern age, science has become a powerful force for progress, enabling us to unlock the secrets of the universe and advance our understanding of the natural world in ways that were unimaginable just a few decades ago.

The wonder of science is that it allows us to explore and comprehend the world around us in ways that were not possible before. Whether it is the deep mysteries of the cosmos or the complex workings of the human body, science enables us to understand the world at an ever-increasing level of detail. By using the scientific method and the tools of mathematics, we can make predictions and uncover secrets that had previously been hidden from view.

Science has also enabled us to make tremendous advances in medicine and other areas of technology. Vaccines have been developed that have saved millions of lives, while the development of computers and the internet have revolutionized how we communicate and acquire knowledge. Science has also enabled us to control our environment in ways that were once unimaginable, such as the development of air conditioning systems and the use of renewable energy sources.

The wonder of science is that it is a never-ending source of discovery. New discoveries are made every day, and these discoveries can lead to even more breakthroughs. The possibilities are endless, and science gives us the opportunity to explore and understand the world around us in ever more profound ways. With each new discovery, we are able to gain a deeper understanding of the world and our place in it.

The wonder of science is that it allows us to explore the unknown and push the boundaries of what is possible. It is a powerful force for progress and for understanding, and its potential for good is limitless. It is a source of endless fascination and wonder, and its power to enrich our lives is unmatched.

Wonder of science essay 150 words:

The Wonder of Science Essay 150 words: Science is a wonderful thing. It has revolutionized the way people live, work, and interact with the world. Science has enabled us to understand the universe and all its complexities, from the inner workings of the atom to the vastness of space. It has brought us new technologies, such as computers and smartphones, which have made our lives easier and more connected. Science has enabled us to cure diseases, create new materials, and explore the depths of the oceans. Science has improved our lives in ways we never imagined.

Science also has the power to bring people closer together. By understanding the cause and effect of events, we can better cooperate and work towards a common goal. By studying the environment, we can find ways to protect it and ensure its preservation. By researching the past, we can learn from our mistakes and make the future brighter.

Science is a source of inspiration and wonder. It encourages us to think, explore, and ask questions. It gives us the tools to discover new things and solve problems. Science has made the impossible possible, and for that, it deserves to be praised.

Wonder of Science Essay 200 words:

The wonder of Science Essay 200 words: The wonders of science are innumerable. It has brought immense progress and development in all spheres of life. Science has made possible the exploration of space and understanding of the universe. It has helped in the improvement of medical care, communication, transportation, and technology. It has made the world a global village and has revolutionized the way we work and live.

Science has enabled us to understand the complexities of the human body and the intricate mechanisms of disease. It has made possible the development of antibiotics and vaccines to combat diseases. It has enabled us to understand the environment and the impact of human activities on it. It has enabled us to create renewable energy sources and use them to better our lives.

Science has enabled us to make great strides in many areas. It has enabled us to make advances in artificial intelligence, automation, robotics, and other fields. It has enabled us to understand the complexity of the human brain and its functions. It has enabled us to create sophisticated technology to improve our quality of life.

The wonders of science cannot be overstated. It has enabled us to make great leaps in understanding the universe and our place in it. It has enabled us to understand the world around us and our place in it. It has enabled us to make great strides in technology and medicine. Its potential continues to reveal itself in every new scientific discovery and invention.

Wonder of Science essay 250 words:

The Wonder of Science essay 250 words: Science is an incredible phenomenon that continues to amaze us with its seemingly magical capabilities. It holds the power to solve some of the most pressing questions concerning the world we live in, from the grandest mysteries of the universe to the most basic questions about life. Science is both a source of knowledge and a tool for exploration, allowing us to gain insight into the workings of the natural world and to create new technologies.

Science is an ever-evolving field, constantly pushing the boundaries of what we know and understand. It allows us to explore the unknown and uncover what lies beyond, from the depths of the ocean to the farthest reaches of space. Science helps us to make sense of our world and to find the answers to some of the most challenging questions. It enables us to gain a better understanding of the complexities of the universe and to make informed decisions about how we interact with it.

Science is a source of endless fascination and discovery, providing us with new ways to explore the universe and answer questions that were once thought to be impossible. It has the potential to revolutionize the way we live and shape the future of our species. We owe a great debt of gratitude to science, and its ability to help us make sense of the world around us.

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Wonder of Science Essay for Students and Children

500+ words essay on wonder of science.

Wonder of Science Essay: Looking at the age when a man led a life like a savage, we notice how far we have come. Similarly, the evolution of mankind is truly commendable. One of the major driving forces behind this is science. It makes you think about the wonder of science and how it has proven to be such a boon in our lives. Most importantly, science has helped develop a great civilization . All the advancements that man has been able to make are with the help of science only. However, it won’t be wrong to say that science is a two-edged sword. It comes with its own set of advantages and disadvantages.

Advantages of Science

To say that science has a lot of benefits would be an understatement. The benefits of science do not just limit to one sphere, but it has proven useful in various spheres of the world. When we talk about innovations in science and engineering, electricity is the first thing that comes to mind. It has helped power the world through its development.

That is to say, all the credit goes to science, as it weren’t for science, life in the 21st century would be impossible. After all, it is quite hard to imagine a world without computers , medicines , televisions , AC’s, automobiles and more. In addition, science has contributed largely to the medical field as well.

It has helped cure deadly diseases and also perform surgeries which were hard to perform before. Therefore, science has changed the world in unimaginable ways.

Get the huge list of more than 500 Essay Topics and Ideas

Disadvantages of Science

As the saying goes ‘there is no rainbow without rain’, similarly science has drawbacks of its own. One must always remember that anything in excess is poison, and science is no different. If it falls into evil hands, it can cause destruction on a massive level. For instance, science is used to create nuclear weapons.

These are deadly enough to cause war and wipe out full-fledged countries. Another drawback is the pollution caused by it. As the world became more industrialized because of science, pollution levels increased. All the high-scale industries are now polluting natural resources like water, air, wood, and more.

Subsequently, this industrial growth has increased rates of unemployment as machines are replacing human labor. So, we see how it also has a considerable amount of drawbacks as well.

In conclusion, we can say that surely science is very beneficial to the modern man. But, innovations and discoveries have also become destructive in various ways for mankind.

Therefore, it must be properly used for the greater benefit of mankind. We must ensure the wise use of these scientific inventions in order to save the world from the evil side of science. As Dr. A.P.J. Abdul Kalam once stated that science is a beautiful gift to humanity, we must not distort it, likewise, we must live by this quote and monitor the utilization.

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Wonder of Science Essay

Essay on Wonder of Science - The most incredible invention of science is electricity. The invention of electricity brings a splendid exchange in human civilisation. Here are 100, 200 and 500 word essay on Wonder Of Science.

Science is a blessing to humans. The position of science could be very vital in our everyday life. With the help of science, we are preparing fantastic medicines which give us immediate comfort. Here are a few sample essays on the "wonder of science".

100 Words Essay on Wonder of Science

We are living in the era of science. It has made our life less difficult and more comfortable. Science has modified the lifestyles of humans and has made them better. Nowadays, each impossible thing has become feasible. Humans can reach the moon. Many medical inventions have made our life very comfortable and secure- electricity is the finest invention of science.

Science serves us in lots of ways- It entertains us with T.V. and the radio. It runs trains, mills, and factories. It cools and warms our horses, motors, scooters, railway engines, airplanes, computers, etc., all technological innovations. Lifestyle is not possible without those scientific innovations.

200 Words Wonder of Science Essay

Science makes humans superior. Science has been elevated to every field of existence. From morning to night time, we generally use technology and its innovation in our day-to-day lifestyle. Science made it feasible to connect with people living far from us. More recent technology, like the hyperloop, bullet trains, and electric vehicles, have made travelling less difficult and quicker.

The New Technological Era

In the field of medical technology, we are now able to save many lives. The treatment that became no longer possible earlier is now a work of seconds. The invention of the vaccine during the Corona pandemic has saved many lives. The educational field also benefited from science and technology. Now college students can have flexible studies because of online education and availability of online resources.

The innovation of missiles, rockets, etc., allows the journey to mars and the moon. The introduction of robots is taking the sector on a whole new route. The combination of technological -how with advanced technology like synthetic Intelligence (A.I.A.I.), internet of things (IoT), virtual reality (V.R.V.R.), augmented reality (A.R.A.R.), blockchain, and so forth is surprising humans with their magic. Science is doing wonders beyond our imagination.

500 Words Essay on Wonder of Science

Science is a blessing to mankind. It makes our life comfortable. Science and its inventions have delivered a revolution in numerous industries. Those innovations have not simply helped in industrialisation but have also made our lives easy and relaxed. In farming, communication, medical science, and nearly every area, Humans have got considerable developments in the understanding of science.

Inventions of Science

Many scientific inventions have made our life easy and comfortable. Modern life is incomplete without these wonders. Some of the scientific inventions are as follows:

Medical inventions | The wonders of technology inside the clinical field aren't much less than a miracle. We've got the capability of transplanting every part of the body via surgical treatment. Way to the invention of X-Rays, Ultrasonography, E.C.G. (Electrocardiogram), Magnetic Resonance Imaging (M.R.I.), Penicillin, and some different modern gadgets, diagnosing the problem is no longer an impossible project. Moreover, it has helped to cure deadly illnesses and perform surgical procedures that were previously unachievable.

Transport | Buses, automobiles, trains, and aeroplanes have made our travel easier, comfier, and quicker. A person can reach any part of the world within hours. Humans have reached different planets with the assistance of rockets.

Communication | With the introduction of lengthy-distance smartphone calls thru S.T.D. and that I.S.D., we speak to our loved ones who are away from us. A mobile telephone is an excellent carrier for guys.

Electricity | Electricity is the greatest invention of science. Today everything works with the help of electricity. Without electricity, the whole world will be dark.

Atomic energy | With the discovery of Atomic energy, humans have harnessed an inexhaustible power source. It can meet the demand for electricity for a long time.

Computers and mobile phones | Computers and phones are the most exceptional invention of technology. Computers have helped people in numerous disciplines. Server machines, rockets, television, station, and satellites are all controlled with the help of computers. The mobile phone has added a new way of communication.

Entertainment and education | Science has given us cinema, T.V., Radio, and many other things. Computers are a great wonder of science. These inventions help in the field of education.

Importance of Science

Science is extremely important in our daily lives. I get out of bed and apply paste and brush, both provided by science. Science is used in cooking, dining, and clothes, among other things. From cooking to working on a laptop, everything we do is because of the invention of science, and we can't imagine our lives without it.

Science is a beautiful gift to humanity. We can not think of our life without technology. Today everything we do is because of science. Lately, science has helped us to deal with the worldwide corona pandemic by establishing vaccines and testing kits. The fabric we wear, the brush and paste we use, the shampoo, the oil we apply, everything is the consequence of the advancement of science. Life is unimaginable without all this, as it has become a necessity.

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Remote sensing scientists use remote sensing technology to support scientists in fields such as community planning, flight planning or the management of natural resources. Analysing data collected from aircraft, satellites or ground-based platforms using statistical analysis software, image analysis software or Geographic Information Systems (GIS) is a significant part of their work. Do you want to learn how to become remote sensing technician? There's no need to be concerned; we've devised a simple remote sensing technician career path for you. Scroll through the pages and read.

Geotechnical engineer

The role of geotechnical engineer starts with reviewing the projects needed to define the required material properties. The work responsibilities are followed by a site investigation of rock, soil, fault distribution and bedrock properties on and below an area of interest. The investigation is aimed to improve the ground engineering design and determine their engineering properties that include how they will interact with, on or in a proposed construction. 

The role of geotechnical engineer in mining includes designing and determining the type of foundations, earthworks, and or pavement subgrades required for the intended man-made structures to be made. Geotechnical engineering jobs are involved in earthen and concrete dam construction projects, working under a range of normal and extreme loading conditions. 

Cartographer

How fascinating it is to represent the whole world on just a piece of paper or a sphere. With the help of maps, we are able to represent the real world on a much smaller scale. Individuals who opt for a career as a cartographer are those who make maps. But, cartography is not just limited to maps, it is about a mixture of art , science , and technology. As a cartographer, not only you will create maps but use various geodetic surveys and remote sensing systems to measure, analyse, and create different maps for political, cultural or educational purposes.

Budget Analyst

Budget analysis, in a nutshell, entails thoroughly analyzing the details of a financial budget. The budget analysis aims to better understand and manage revenue. Budget analysts assist in the achievement of financial targets, the preservation of profitability, and the pursuit of long-term growth for a business. Budget analysts generally have a bachelor's degree in accounting, finance, economics, or a closely related field. Knowledge of Financial Management is of prime importance in this career.

Product Manager

A Product Manager is a professional responsible for product planning and marketing. He or she manages the product throughout the Product Life Cycle, gathering and prioritising the product. A product manager job description includes defining the product vision and working closely with team members of other departments to deliver winning products.  

Underwriter

An underwriter is a person who assesses and evaluates the risk of insurance in his or her field like mortgage, loan, health policy, investment, and so on and so forth. The underwriter career path does involve risks as analysing the risks means finding out if there is a way for the insurance underwriter jobs to recover the money from its clients. If the risk turns out to be too much for the company then in the future it is an underwriter who will be held accountable for it. Therefore, one must carry out his or her job with a lot of attention and diligence.

Finance Executive

Operations manager.

Individuals in the operations manager jobs are responsible for ensuring the efficiency of each department to acquire its optimal goal. They plan the use of resources and distribution of materials. The operations manager's job description includes managing budgets, negotiating contracts, and performing administrative tasks.

Bank Probationary Officer (PO)

Investment director.

An investment director is a person who helps corporations and individuals manage their finances. They can help them develop a strategy to achieve their goals, including paying off debts and investing in the future. In addition, he or she can help individuals make informed decisions.

Welding Engineer

Welding Engineer Job Description: A Welding Engineer work involves managing welding projects and supervising welding teams. He or she is responsible for reviewing welding procedures, processes and documentation. A career as Welding Engineer involves conducting failure analyses and causes on welding issues. 

Transportation Planner

A career as Transportation Planner requires technical application of science and technology in engineering, particularly the concepts, equipment and technologies involved in the production of products and services. In fields like land use, infrastructure review, ecological standards and street design, he or she considers issues of health, environment and performance. A Transportation Planner assigns resources for implementing and designing programmes. He or she is responsible for assessing needs, preparing plans and forecasts and compliance with regulations.

An expert in plumbing is aware of building regulations and safety standards and works to make sure these standards are upheld. Testing pipes for leakage using air pressure and other gauges, and also the ability to construct new pipe systems by cutting, fitting, measuring and threading pipes are some of the other more involved aspects of plumbing. Individuals in the plumber career path are self-employed or work for a small business employing less than ten people, though some might find working for larger entities or the government more desirable.

Construction Manager

Individuals who opt for a career as construction managers have a senior-level management role offered in construction firms. Responsibilities in the construction management career path are assigning tasks to workers, inspecting their work, and coordinating with other professionals including architects, subcontractors, and building services engineers.

Urban Planner

Urban Planning careers revolve around the idea of developing a plan to use the land optimally, without affecting the environment. Urban planning jobs are offered to those candidates who are skilled in making the right use of land to distribute the growing population, to create various communities. 

Urban planning careers come with the opportunity to make changes to the existing cities and towns. They identify various community needs and make short and long-term plans accordingly.

Highway Engineer

Highway Engineer Job Description:  A Highway Engineer is a civil engineer who specialises in planning and building thousands of miles of roads that support connectivity and allow transportation across the country. He or she ensures that traffic management schemes are effectively planned concerning economic sustainability and successful implementation.

Environmental Engineer

Individuals who opt for a career as an environmental engineer are construction professionals who utilise the skills and knowledge of biology, soil science, chemistry and the concept of engineering to design and develop projects that serve as solutions to various environmental problems. 

Naval Architect

A Naval Architect is a professional who designs, produces and repairs safe and sea-worthy surfaces or underwater structures. A Naval Architect stays involved in creating and designing ships, ferries, submarines and yachts with implementation of various principles such as gravity, ideal hull form, buoyancy and stability. 

Orthotist and Prosthetist

Orthotists and Prosthetists are professionals who provide aid to patients with disabilities. They fix them to artificial limbs (prosthetics) and help them to regain stability. There are times when people lose their limbs in an accident. In some other occasions, they are born without a limb or orthopaedic impairment. Orthotists and prosthetists play a crucial role in their lives with fixing them to assistive devices and provide mobility.

Veterinary Doctor

Pathologist.

A career in pathology in India is filled with several responsibilities as it is a medical branch and affects human lives. The demand for pathologists has been increasing over the past few years as people are getting more aware of different diseases. Not only that, but an increase in population and lifestyle changes have also contributed to the increase in a pathologist’s demand. The pathology careers provide an extremely huge number of opportunities and if you want to be a part of the medical field you can consider being a pathologist. If you want to know more about a career in pathology in India then continue reading this article.

Speech Therapist

Gynaecologist.

Gynaecology can be defined as the study of the female body. The job outlook for gynaecology is excellent since there is evergreen demand for one because of their responsibility of dealing with not only women’s health but also fertility and pregnancy issues. Although most women prefer to have a women obstetrician gynaecologist as their doctor, men also explore a career as a gynaecologist and there are ample amounts of male doctors in the field who are gynaecologists and aid women during delivery and childbirth. 

An oncologist is a specialised doctor responsible for providing medical care to patients diagnosed with cancer. He or she uses several therapies to control the cancer and its effect on the human body such as chemotherapy, immunotherapy, radiation therapy and biopsy. An oncologist designs a treatment plan based on a pathology report after diagnosing the type of cancer and where it is spreading inside the body.

Audiologist

The audiologist career involves audiology professionals who are responsible to treat hearing loss and proactively preventing the relevant damage. Individuals who opt for a career as an audiologist use various testing strategies with the aim to determine if someone has a normal sensitivity to sounds or not. After the identification of hearing loss, a hearing doctor is required to determine which sections of the hearing are affected, to what extent they are affected, and where the wound causing the hearing loss is found. As soon as the hearing loss is identified, the patients are provided with recommendations for interventions and rehabilitation such as hearing aids, cochlear implants, and appropriate medical referrals. While audiology is a branch of science that studies and researches hearing, balance, and related disorders.

Hospital Administrator

The hospital Administrator is in charge of organising and supervising the daily operations of medical services and facilities. This organising includes managing of organisation’s staff and its members in service, budgets, service reports, departmental reporting and taking reminders of patient care and services.

For an individual who opts for a career as an actor, the primary responsibility is to completely speak to the character he or she is playing and to persuade the crowd that the character is genuine by connecting with them and bringing them into the story. This applies to significant roles and littler parts, as all roles join to make an effective creation. Here in this article, we will discuss how to become an actor in India, actor exams, actor salary in India, and actor jobs. 

Individuals who opt for a career as acrobats create and direct original routines for themselves, in addition to developing interpretations of existing routines. The work of circus acrobats can be seen in a variety of performance settings, including circus, reality shows, sports events like the Olympics, movies and commercials. Individuals who opt for a career as acrobats must be prepared to face rejections and intermittent periods of work. The creativity of acrobats may extend to other aspects of the performance. For example, acrobats in the circus may work with gym trainers, celebrities or collaborate with other professionals to enhance such performance elements as costume and or maybe at the teaching end of the career.

Video Game Designer

Career as a video game designer is filled with excitement as well as responsibilities. A video game designer is someone who is involved in the process of creating a game from day one. He or she is responsible for fulfilling duties like designing the character of the game, the several levels involved, plot, art and similar other elements. Individuals who opt for a career as a video game designer may also write the codes for the game using different programming languages.

Depending on the video game designer job description and experience they may also have to lead a team and do the early testing of the game in order to suggest changes and find loopholes.

Radio Jockey

Radio Jockey is an exciting, promising career and a great challenge for music lovers. If you are really interested in a career as radio jockey, then it is very important for an RJ to have an automatic, fun, and friendly personality. If you want to get a job done in this field, a strong command of the language and a good voice are always good things. Apart from this, in order to be a good radio jockey, you will also listen to good radio jockeys so that you can understand their style and later make your own by practicing.

A career as radio jockey has a lot to offer to deserving candidates. If you want to know more about a career as radio jockey, and how to become a radio jockey then continue reading the article.

Choreographer

The word “choreography" actually comes from Greek words that mean “dance writing." Individuals who opt for a career as a choreographer create and direct original dances, in addition to developing interpretations of existing dances. A Choreographer dances and utilises his or her creativity in other aspects of dance performance. For example, he or she may work with the music director to select music or collaborate with other famous choreographers to enhance such performance elements as lighting, costume and set design.

Videographer

Multimedia specialist.

A multimedia specialist is a media professional who creates, audio, videos, graphic image files, computer animations for multimedia applications. He or she is responsible for planning, producing, and maintaining websites and applications. 

Social Media Manager

A career as social media manager involves implementing the company’s or brand’s marketing plan across all social media channels. Social media managers help in building or improving a brand’s or a company’s website traffic, build brand awareness, create and implement marketing and brand strategy. Social media managers are key to important social communication as well.

Copy Writer

In a career as a copywriter, one has to consult with the client and understand the brief well. A career as a copywriter has a lot to offer to deserving candidates. Several new mediums of advertising are opening therefore making it a lucrative career choice. Students can pursue various copywriter courses such as Journalism , Advertising , Marketing Management . Here, we have discussed how to become a freelance copywriter, copywriter career path, how to become a copywriter in India, and copywriting career outlook. 

Careers in journalism are filled with excitement as well as responsibilities. One cannot afford to miss out on the details. As it is the small details that provide insights into a story. Depending on those insights a journalist goes about writing a news article. A journalism career can be stressful at times but if you are someone who is passionate about it then it is the right choice for you. If you want to know more about the media field and journalist career then continue reading this article.

For publishing books, newspapers, magazines and digital material, editorial and commercial strategies are set by publishers. Individuals in publishing career paths make choices about the markets their businesses will reach and the type of content that their audience will be served. Individuals in book publisher careers collaborate with editorial staff, designers, authors, and freelance contributors who develop and manage the creation of content.

In a career as a vlogger, one generally works for himself or herself. However, once an individual has gained viewership there are several brands and companies that approach them for paid collaboration. It is one of those fields where an individual can earn well while following his or her passion. 

Ever since internet costs got reduced the viewership for these types of content has increased on a large scale. Therefore, a career as a vlogger has a lot to offer. If you want to know more about the Vlogger eligibility, roles and responsibilities then continue reading the article. 

Individuals in the editor career path is an unsung hero of the news industry who polishes the language of the news stories provided by stringers, reporters, copywriters and content writers and also news agencies. Individuals who opt for a career as an editor make it more persuasive, concise and clear for readers. In this article, we will discuss the details of the editor's career path such as how to become an editor in India, editor salary in India and editor skills and qualities.

Linguistic meaning is related to language or Linguistics which is the study of languages. A career as a linguistic meaning, a profession that is based on the scientific study of language, and it's a very broad field with many specialities. Famous linguists work in academia, researching and teaching different areas of language, such as phonetics (sounds), syntax (word order) and semantics (meaning). 

Other researchers focus on specialities like computational linguistics, which seeks to better match human and computer language capacities, or applied linguistics, which is concerned with improving language education. Still, others work as language experts for the government, advertising companies, dictionary publishers and various other private enterprises. Some might work from home as freelance linguists. Philologist, phonologist, and dialectician are some of Linguist synonym. Linguists can study French , German , Italian . 

Public Relation Executive

Travel journalist.

The career of a travel journalist is full of passion, excitement and responsibility. Journalism as a career could be challenging at times, but if you're someone who has been genuinely enthusiastic about all this, then it is the best decision for you. Travel journalism jobs are all about insightful, artfully written, informative narratives designed to cover the travel industry. Travel Journalist is someone who explores, gathers and presents information as a news article.

Quality Controller

A quality controller plays a crucial role in an organisation. He or she is responsible for performing quality checks on manufactured products. He or she identifies the defects in a product and rejects the product. 

A quality controller records detailed information about products with defects and sends it to the supervisor or plant manager to take necessary actions to improve the production process.

Production Manager

Merchandiser.

A QA Lead is in charge of the QA Team. The role of QA Lead comes with the responsibility of assessing services and products in order to determine that he or she meets the quality standards. He or she develops, implements and manages test plans. 

Metallurgical Engineer

A metallurgical engineer is a professional who studies and produces materials that bring power to our world. He or she extracts metals from ores and rocks and transforms them into alloys, high-purity metals and other materials used in developing infrastructure, transportation and healthcare equipment. 

Azure Administrator

An Azure Administrator is a professional responsible for implementing, monitoring, and maintaining Azure Solutions. He or she manages cloud infrastructure service instances and various cloud servers as well as sets up public and private cloud systems. 

AWS Solution Architect

An AWS Solution Architect is someone who specializes in developing and implementing cloud computing systems. He or she has a good understanding of the various aspects of cloud computing and can confidently deploy and manage their systems. He or she troubleshoots the issues and evaluates the risk from the third party. 

Computer Programmer

Careers in computer programming primarily refer to the systematic act of writing code and moreover include wider computer science areas. The word 'programmer' or 'coder' has entered into practice with the growing number of newly self-taught tech enthusiasts. Computer programming careers involve the use of designs created by software developers and engineers and transforming them into commands that can be implemented by computers. These commands result in regular usage of social media sites, word-processing applications and browsers.

ITSM Manager

Information security manager.

Individuals in the information security manager career path involves in overseeing and controlling all aspects of computer security. The IT security manager job description includes planning and carrying out security measures to protect the business data and information from corruption, theft, unauthorised access, and deliberate attack 

Business Intelligence Developer

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CBSE Class 9 Science Sample Paper 2023-24 PDF (Free Download)

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Science in class 9 is a basic level that helps a student in further classes. Therefore, students should prepare properly for their Science exam. To prepare, they should use the CBSE Class 9 Science Sample Paper which is based on the exam pattern released by the Central Board of Secondary Education.

Apart from that, the subject matter experts at Selfstudys have prepared the CBSE Class 9 Science Sample Paper 2023-24 by adhering to the latest exam pattern and CBSE Class 9 Syllabus. Therefore, it is vital for the students to finish their syllabus first and then go through the Science sample question papers. 

To assist students in their final exam preparation, on this page, we have provided the direct download link.

Why Someone Needs CBSE Class 9 Science Sample Paper?

Solving the CBSE Class 9 Science Sample papers is not necessary but it is beneficial for the students while preparing for the final examination. By referring to the Sample Paper of Science for Class 9, a student can easily practice the questions that are generally asked in the annual examination. 

Apart from that, Science sample papers should be solved by a student to have a better understanding of their weak points or strongest points. In other words Someone Needs CBSE Class 9 Science Sample Paper to check how much they are prepared for the annual examination. If they find any weak areas in the subject they can work on that to improve.

Is It Worth To Use CBSE Sample Question Paper for Class 9 Science?

Ofcourse, the use of CBSE Sample Question Paper for Class 9 Science assists the students to track their learning and exam preparation process. Also, the sample papers allow students to solve the same difficulty level of questions time and again to develop a better grip on the questions regardless of its difficulty. 

In other words, the Class 9 Science sample papers prepared by our subject matter experts help the students to score good marks by answering all kinds of questions.

CBSE Sample Question Paper for Class 9 Science not only helps in annual exam preparation but assists in SA1 or half yearly examination.

Sample Paper of Science for Class 9 with Solution

Since questions in Class 9 Science Sample Paper are of the final level examination; students may face some difficulty to answer the questions. Therefore, our subject matter experts have solved the whole sample paper of class 9 Science CBSE 2023-24 in an easy to understand manner. 

CBSE Class 9 Science Sample Paper 2024 Set 1

CBSE Class 9 Science Sample Paper 2024 Set 2

CBSE Class 9 Science Sample Paper 2024 Set 3

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CBSE Class 9 Science Sample Paper 2023 Set 1

CBSE Class 9 Science Sample Paper 2023 Set 2

CBSE Class 9 Science Sample Paper 2023 Set 3

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CBSE Class 9 Science Sample Paper 2023 Set 5

CBSE Class 9 Science Sample Paper (Term-1) 2021-22 Set - 1

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By using the sample paper of Science for Class 9 with Solution students can cross check their answers and find out the mistakes to improve. The Science sample papers of class 9 with solutions are very helpful for the final exam preparation and that is why it is advised to the students to refer to sample question papers during the exam preparation.

CBSE Class 9 Science Half Yearly Sample Paper

In CBSE Class 9 Science half yearly exam, the questions are asked from the half syllabus. Meaning, a student has to prepare for their half yearly exam by covering their Class 9 Science half syllabus and by practicing the CBSE Class 9 Science Half Yearly Sample Paper.

The half yearly sample papers of class 9 Science will help students to find out the most important topics they should cover in order to score higher marks. It will also assist them to learn about their mistakes or weak points in Science subject.

Set Wise CBSE Class 9 Science Sample Paper

More is less! So, to help the students practice an enormous number of questions our subject matter experts have developed the CBSE Class 9 Science Sample Paper in set wise. We don’t only give a single set of question papers but a bundle of sample papers to allow students to solve the questions as much as possible. 

Solving the complete set wise class 9 Science sample papers students can master the subject and their questions. Because each question is asked from the CBSE Class 9 Syllabus .

Use Class 9 Science Sample Paper To Know Everything About Annual Question Papers Before Appearing in the exam

All students spend their days and nights covering their syllabus so that they can perform better in their annual examination. Not only this, but they fear and feel anxious before appearing in the examination so it is advised by the expert teachers to solve class 9 Science sample papers to know everything about annual question papers before appearing in the exam.

After being thorough with the question papers students will gather these informations:

• Number of questions asked in Science
• Total marking scheme
• Question’s difficulty level
• Important topics
• Time requirements to answer the complete question papers and many more vital information.

Benefits of CBSE Class 9 Science Sample Paper

Practicing the CBSE Class 9 Science Sample Paper on a regular basis provides students with a lot of benefits. Those benefits are -

• Helps in being thorough with the types of questions that are asked in the final examination.
• Supports in doing a regular practice to the various questions for a strong base.
• Gives details about the marking scheme for the Science subject.
• One of the best advantages of solving the sample question paper for class 9 CBSE Science is that it assists in revision.
•  Gives an opportunity to be thorough with the exam pattern and the exam environment.

Features of CBSE Sample Question Paper for Class 9 Science

Since the CBSE sample question paper for class 9 Science is prepared by our subject matter experts, the sample paper is filled with lots of useful features. Those features are -

• Questions are based on the prescribed CBSE Class 9 Syllabus & exam pattern.
• Sample paper is available in PDF for the ease of students so that they can download it and use them to do the practice.
• It is absolutely free of cost
• Our experts have solved the whole questions in an easy to understand manner.

How to Download CBSE Class 9 Science Sample Paper 2023-24 in PDF?

Follow these simple steps to download the CBSE class 9 Science sample paper 2023-24 in PDF:-

• Open Selfstudys website

• Navigate to the CBSE in the navigation bar or button and click on Sample papers

• A new page will open where you have to choose your class 10

• Now, in the class 10 page, click on Science to get Class 9 Science sample papers for free of cost in PDF file format.

Annual Exam Preparation Tips Using CBSE Science Sample Paper 2023-24 for Class 9 With Solution

To prepare for the annual exam preparation the usage of CBSE Science sample paper 2023-24 for class 9 with solutions are advised. Here are some tips a class 9 student can use to prepare for their annual exam:-

• Be thorough with every single chapter of Class 9 Science
• Solve exercise wise questions
• Refer to the sample question papers of Science class 9 to understand the annual question papers pattern.

Does CBSE Give Sample Paper for Class 9?

No, the board authority doesn’t prepare the class 9 CBSE Science sample paper SA1, SA2 or for final examination. However, a standard exam pattern and syllabus are released by them based on that our subject matter experts prepare the CBSE class 9 Science sample paper 2023-24. Also, the previous year question papers have been analysed by the subject experts while preparing the sample question paper of Science.

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• CBSE Class 9 Science Sample Question Paper - 1 2023-24
• Sample Papers

Science Mock Paper-1 for CBSE Class 9 Exams

CBSE Class 9 sciences sample paper is created to solve a varied amount of questions and its main focus is to help students prepare for their examinations in a better manner. It has become imperative for students to understand that Class 9 is a very important year and sets the course for the next years. By using these sample papers, students will be able to make more thorough preparations and study harder. Class 9 sample question paper science will test students' knowledge of chemistry, physics, and biology. Students will have a better understanding of the question paper pattern and what could potentially come in their examination.

Vedantu is a platform that provides free CBSE Solutions (NCERT) and other study materials for students. Download Class 9 Maths and Class 9 Science NCERT Solutions to help you to revise the complete syllabus and score more marks in your examinations.

Class 9 Sample Question Paper Science - Free PDF Download

This mock paper provides students with a transparent understanding of the potential questions that could come and how the question paper pattern is set. Students must understand this format when they study so that their preparation process could be more structured by basing it out on the topics that have more weightage. Vedantu provides the sample question paper for Class 9 science for free to all on its website and it is easily downloadable on all devices. Students can also download and print out the paper so they don’t waste further time on their devices and can get back to preparing for their examinations.

CBSE Sample Papers for Class 9 Science Syllabus 

The following is the revised syllabus so that students can follow the updated syllabus and not waste time on redundant topics. Students can use the syllabus to create a more structured preparation process. The subject provides us with a detailed look into the subject and here we have divided the topics based on weightage. 

Conclusion 

This article has shown students how important it is to study based on the syllabus and the use of the CBSE Class 9 science sample question paper to prepare for the final examinations. By analyzing students' answers on the sample question paper, they can change their approach to the subject and prepare differently. Students can rely on these sample papers as they are genuine and reliable because they are set by experts in the field.

Science subject for Class 9 CBSE comprises Physics, Chemistry, and Biology, and all these three sections are very important for the students to understand well. Because it will not only help the students get good marks in the exam, but also it will expand the understanding of the students for the science subject, which will help them in their future scientific endeavors.

Taking this into consideration, Vedantu has prepared and brought to you a mock test for the science subject of Class 9, CBSE. Because solving the mock test gives the students an idea about their understanding of the subject, and the performance of the Mock test also helps the students to find out their weaker sections, so that they can improve.

Advantages of the Science Sample Papers for the CBSE Class 9

It helps the students get an idea of how the actual exam may feel like.

It helps the students find out their weaknesses and strengths of the science subject so that before the final exam they can learn and revise the topics that require more attention.

It also helps the students in managing their time in a better manner. Because not all the questions are the same, some questions require less time while the others require more, and the students must do the same in the exam.

Therefore, solving the sample questions paper becomes very important for the students of the Class 9 science, CBSE board.

FAQs on CBSE Class 9 Science Sample Question Paper - 1 2023-24

In an ideal sample question paper for the Class 9 science, CBSE board, questions from all the chapters of the book are supposed to be included because in the exam the question comes from all the chapters and not from some selected few chapters. Therefore, the sample papers for the Class 9 science CBSE exam, that Vedantu provides cover all the chapters of the syllabus, like Matter – its nature and behaviors, Organisations in the living world, motion, force and work, and questions from all the other chapters are included in the sample question papers.

Also, before giving solving the sample papers for Class 9 CBSE science subject, you may find the revision notes for the same helpful, on Vedantu .

Yes, you should still be solving the sample papers for the Class 9 CBSE science subject even though you have already solved all the questions from the exercise given in the textbook, which is by the way a really good thing.

Solving sample papers and solving the exercise questions are two different things. Question papers are designed for the exam, which is the test of the overall understanding of the students for the science subject (CBSE), while the exercise papers are designed to test the understanding of that particular chapter, which students have to solve on their own, of course with the help of the teacher whenever required.

If you are I hunt for the sample question papers or Mock papers for Class 9, science subject for the CBSE board, then you have already arrived at the right place. Yes, at Vedantu you will find all the study materials for your Class 9 exam, including the sample or the mock papers for the science subject. These sample papers are available for free download to all the students. So, everyone can take benefit from it. Hence, download the sample papers for Class 9, CBSE Board now.

The sample or the mock papers that Vedantu provides for free to the students of the 9th class, for the subject of science is designed in a manner that resembles the real exam. Therefore, a total of 41 questions are given in the paper. These 41 questions are divided into two sections:

Section A consists of 25 questions, in these questions students are supposed to write the answers to the questions, either in one word or in more words.

Section B consists of 16 questions and these are the multiple-choice type questions.

Because the Mock papers that Vedantu provides for Class 9, science subject of the CBSE Board, are designed by the top experts, in a manner that will help the students not only score good marks in the exam, but also in understating the subject of Class 9 science at a deeper and a better level. Furthermore, the Class 9, CBSE science mock paper is available for totally free in a downloadable PDF file format, so that maximum numbers of students can benefit from it.  

CBSE Sample Papers for Class 9 Science PDF Download

Cbse sample papers for class 9 science.

CBSE (Central Board of Secondary Education) sample papers for class 9 Science are designed to help students prepare for the final exam by providing a thorough understanding of the latest exam pattern, marking scheme, and syllabus. The CBSE sample papers for class 9 Science cover all the important topics taught in the subject, including Matter, Motion, Sound, Force and Laws of Motion, Natural Resources, Diversity of Living Organisms, and more. They consist of a variety of questions such as multiple-choice questions, short answer questions, long answer questions, and assertion-reasoning questions.

Year Wise Sample Papers for Class 9 Science

Year wise sample papers for class 9 refer to sets of practice question papers designed according to the latest syllabus and examination pattern for each academic year. These sample papers are created by subject experts and aim to provide students with an understanding of the types of questions that can be asked in the final exams.

• CBSE Sample Question Paper (2022-23) - 1
• CBSE Sample Question Paper (2022-23) - 2
• Sample Question Paper Term II- 1 (With Solutions)
• Sample Question Paper Term II- 2 (With Solutions)
• Sample Question Paper Term I- 1 (With Solutions)
• Sample Question Paper Term I- 2 (With Solutions)
• Sample Question Paper Term I- 3 (With Solutions)
• Sample Question Paper Term I- 4 (With Solutions)
• Sample Question Paper Term I- 5 (With Solutions)
• CBSE Sample Question Paper Term I - 1
• Sample Question Paper Term I- 6 (With Solutions)
• Sample Question Paper Term I- 7 (With Solutions)
• Sample Question Paper Term I- 8 (With Solutions)
• Sample Question Paper Term I- 9 (With Solutions)
• CBSE Sample Question Paper Term I - 2
• Sample Question Paper Term I- 10 (With Solutions)
• Sample Question Paper Term I- 11 (With Solutions)
• Sample Question Paper Term I- 12 (With Solutions)
• Sample Question Paper- 1 (With Solutions)
• Sample Question Paper- 2 (With Solutions)
• Sample Question Paper- 3 (With Solutions)
• Sample Question Paper- 4 (With Solutions)
• Sample Question Paper- 5 (With Solutions)
• Sample Question Paper- 6 (With Solutions)
• Sample Question Paper- 7 (With Solutions)
• Sample Question Paper- 8 (With Solutions)
• Sample Question Paper- 9 (With Solutions)
• Sample Question Paper- 10 (With Solutions)
• Sample Question Paper- 11 (With Solutions)
• Sample Question Paper- 12 (With Solutions)
• Sample Practice Question Paper- 1
• Solutions of Sample Practice Question Paper- 1
• Sample Practice Question Paper- 2
• Solutions of Sample Practice Question Paper- 2
• Sample Practice Question Paper- 3
• Solutions of Sample Practice Question Paper- 3
• Sample Practice Question Paper- 4
• Solutions of Sample Practice Question Paper- 4
• Sample Practice Question Paper- 5
• Solutions of Sample Practice Question Paper- 5
• Sample Practice Question Paper- 6
• Solutions of Sample Practice Question Paper- 6
• Sample Practice Question Paper- 7
• Solutions of Sample Practice Question Paper- 7
• Sample Practice Question Paper- 8
• Solutions of Sample Practice Question Paper- 8
• Sample Practice Question Paper- 9
• Solutions of Sample Practice Question Paper- 9
• Sample Practice Question Paper- 10
• Solutions of Sample Practice Question Paper- 10
• CBSE Sample Paper - 1, Science, Class 9
• CBSE Sample Paper - 2, Science, Class 9
• CBSE Sample Paper - 3, Science, Class 9

Unit Wise Weightage of CBSE Class 9 Science

Why Someone Needs CBSE Class 9 Science Sample Paper?

There are several reasons why someone might need CBSE Class 9 sample papers. Here are some of the main reasons:

• Exam preparation: CBSE Class 9 sample papers are an excellent resource for students who are preparing for their exams. These papers provide students with an idea of the exam pattern, marking scheme, and types of questions that may appear in the exam.
• Practice: Sample papers give students ample opportunity to practice and test their knowledge. Regular practice with sample papers helps students to identify their weak areas and work on them to improve their performance.
• Time management:  CBSE Class 9 sample papers help students to improve their time management skills. By solving these papers within the given time frame, students can learn how to manage their time effectively during the exam.
• Self-assessment:  Sample papers allow students to assess their own performance and identify areas that need improvement. This helps students to become more confident and better prepared for the actual exam.
• Familiarity with exam pattern:  Sample papers give students a better understanding of the exam pattern and format. This helps them to feel more familiar and comfortable with the actual exam, reducing exam anxiety and stress.

In conclusion, CBSE Class 9 sample papers are a valuable resource for students who want to improve their exam preparation, practice their knowledge, improve their time management skills, assess their performance, and become more familiar with the exam pattern.

Benefits of CBSE Class 9 Science

CBSE Class 9 sample papers offer numerous benefits for students. Some of the benefits are:

• Understanding the exam pattern: Solving sample papers helps students to understand the exam pattern, including the types of questions asked, the weightage of marks, and the time duration of the exam. It gives them a clear idea of the format of the actual exam.
• Practice and revision:  Sample papers help students to practice and revise the syllabus thoroughly. It helps them to identify their weak areas and work on them, which results in better performance in the actual exam.
• Boosts confidence:  Regular practice with sample papers enhances students' confidence, and they feel more prepared for the actual exam. It helps to reduce anxiety and stress, which may negatively affect their performance in the exam.
• Improves problem-solving skills:  Solving sample papers improves students' problem-solving skills, which is an essential component of Maths and Science subjects. It enhances their analytical and critical thinking abilities, which can be applied in real-life situations.
• Familiarity with exam conditions: Practicing sample papers under exam conditions gives students a feel of the actual exam. It helps them to adapt to the exam environment, and they feel more comfortable during the actual exam.

In conclusion, CBSE Class 9 sample papers provide several benefits for students, such as understanding the exam pattern, practice and revision, time management, self-assessment, boosting confidence, improving problem-solving skills, and familiarity with exam conditions. Regular practice with sample papers can help students to excel in the actual exam and achieve their desired grades.

Features of CBSE Sample Question Paper for Class 9 Science

CBSE sample question papers for Class 9 have several features that make them an effective tool for exam preparation. Some of the features are:

• Based on the latest CBSE syllabus: The sample question papers are designed based on the latest CBSE syllabus. They cover all the topics and subtopics included in the syllabus and provide a comprehensive overview of the exam pattern.
• Multiple sets:  CBSE sample question papers for Class 9 are available in multiple sets. This ensures that students get a variety of questions to practice and helps them to prepare for any type of question that may be asked in the actual exam.
• Marking scheme: Sample question papers come with a marking scheme that helps students to understand the weightage of each question and the marking scheme followed by the examiners.
• Time duration:  Sample question papers provide information on the time duration of the exam. This helps students to manage their time effectively and ensure that they complete the paper within the given time frame.
• Objective and subjective questions: The sample question papers contain both objective and subjective type questions. This provides students with practice in answering different types of questions and improves their problem-solving skills.
• Model answers: CBSE sample question papers also come with model answers. These answers provide students with a clear understanding of how to write their answers and the format to follow.
• Improved exam readiness:  Regular practice with CBSE sample question papers helps students to improve their exam readiness. It helps them to identify their weak areas and work on them, resulting in better performance in the actual exam.

In conclusion, CBSE sample question papers for Class 9 provide several features that make them an effective tool for exam preparation. They are based on the latest CBSE syllabus, available in multiple sets, provide marking scheme and time duration information, contain objective and subjective type questions, model answers, and improve exam readiness.

Frequently Asked Questions (FAQs) on Sample Papers for Class 9 Science

What is a sample paper for class 9 science.

A sample paper for class 9 science is a document that provides students with a set of questions and problems that they can use to practice and prepare for their class 9 science exams.

What is the purpose of a sample paper for class 9 science?

The purpose of a sample paper for class 9 science is to help students to get familiar with the exam pattern, understand the types of questions that can be asked, and practice solving problems in a time-bound manner.

How many sample papers should I solve for class 9 science?

It is recommended that you solve at least 3 to 4 sample papers for class 9 science to get a good amount of practice and gain confidence in your abilities.

What is the best way to use sample papers for class 9 science?

The best way to use sample papers for class 9 science is to attempt them in a simulated exam environment, adhering to the time limit and exam rules. After completing the paper, analyze your performance, identify your weaknesses, and work on them.

Top Courses for Class 9

Previous year questions with solutions, video lectures, important questions, shortcuts and tricks, viva questions, mock tests for examination, sample paper, extra questions, objective type questions, past year papers, study material, semester notes, practice quizzes.

CBSE Sample Papers for Class 9 Science Free PDF Download

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Class 9 Science Sample Paper

Please refer to the Class 9 Science Sample Paper below. These CBSE Sample Papers for Class 9 Science have been prepared based on the latest guidelines and examination patterns issued for the current academic year. We have provided Term 1 and Term 2 sample papers with solutions. You can click on the links below and access the free latest CBSE Sample Papers for Science for Standard 9. All guess papers for Science Class 9 have been prepared by expert teachers. You will be able to understand the type of questions which are expected to come in the examinations and get better marks.

CBSE Sample Papers for Class 9 Science

Class 9 Science Sample Paper Term 1 With Solutions Set A

Question. Which of the following are physical changes? i. Melting of iron metal ii. Rusting of iron iii. Bending of an iron rod iv. Drawing a wire of iron metal a) (i), (ii) and (iii) b) (ii), (iii) and (iv) c) (i), (ii) and (iv) d) (i), (iii) and (iv)

(d) (i), (iii) and (iv) Explanation: Melting of iron metal, bending of an iron rod and drawing wire of iron metal are all physical changes whereas rusting of iron is a chemical change.

Question. We use glycerine in temporary mount of the material because: a) it increases the clarity of the material b) it increases the beauty c) it avoids drying of the material d) it provides the medium for floating the material

(c) it avoids drying of the material Explanation: Glycerine is used for temporary mounting as it is hygroscopic and does not allow the mounted material to dry up.

Question. Girth of stem increases due to a) apical meristem b) vertical meristem c) intercalary meristem d) lateral meristem

(d) lateral meristem Explanation: The lateral meristematic tissues are responsible for an increase in the diameter or girth of the plant.

Question. A body starting at a point, say A, reaches, say B, ahead in a straight line and returns back to A. Then there is: a) negative displacement b) cannot be said c) zero displacement d) positive displacement

(c) zero displacement Explanation: When the body comes back to its starting point, it has zero resultant displacements but covers a certain non-zero distance.

Question. Newton’s third law tells that ________ force does not exist. a) motion b) isolated c) movement d) momentum

( b) isolated Explanation: Force can not generate in a body on its own.

Question. A student mixed the white of an egg with water and stirred it well. After sometimes he observe that: a) egg white settles down at the bottom b) a transparent solution is formed c) a translucent mixture is formed d) egg white floats on the surface of the water

( c) a translucent mixture is formed Explanation: Egg white is translucent. Egg albumin forms colloidal solution which is translucent.

Question. The cell sap in plant cells consists of: a) water + organic substances b) both (water only) and (water + inorganic substances) c) water only d) water + inorganic substances

(b) both (water only) and (water + inorganic substances) Explanation: The liquid found inside the plant cell vacuole is referred to as the cell sap and it is a dilute fluid consisting of water, amino acids, glucose i.e. (water + inorganic substances), water may also be inhabited with a negligible amount of salts because it somehow depends on the mineral excess inside the body of plants. The excess material is temporarily stored inside the cell sap. Thus, vacuoles act as storehouses in plants.

Question. Parenchyma which contains chlorophyll and helps in photosynthesis is called ________. a) Collenchyma b) Aerenchyma c) Sclerenchyma d) Chlorenchyma

(d) Chlorenchyma Explanation: Parenchyma tissues which contain chlorophyll and helps in photosynthesis are called chlorenchyma.

Question. Which of the following statements is not true? A. motion is always uniform B. motion is a change of position C. motion can be described in terms of displacement D. motion can be uniform or non-uniform a) (B) b) (A) c) (D) d) (C)

(b) (A) Explanation: Motion can be non-uniform if there is a change in velocity.

Question. The unit of momentum can be expressed as a) N/s b) N – s c) kg s 2 /m d) kg m/s 2

(b) N – s Explanation: The Newton second (also newton-second, symbol Ns or N·s)is the derived SI unit of Momentum. It is dimensionally equivalent to the momentum unit kilogram metre per second (kgm/s). One newton second corresponds to a one-newton force applied for one second. F → .t = mv →

Question. A mixture of sulphur and carbon disulphide is  a) heterogeneous and shows Tyndall effect b) heterogeneous and does not show Tyndall effect c) homogeneous and shows Tyndall effect d) homogeneous and does not show Tyndall effect

(d) homogeneous and does not show Tyndall effect Explanation: Sulphur and carbon disulphide do not form a uniform composition and the properties of the mixture are not same throughout. Therefore, it forms a heterogeneous composition. Moreover, it shows a Tyndall effect, because in water sulphur remains suspended whereas carbon disulphide settles down as a layer at the bottom.

Question. Amoeba acquires its food through: a) Exocytosis & Endocytosis b) Exocytosis c) Plasmolysis d) Endocytosis

( d) Endocytosis Explanation: Amoeba acquires its food by the process of endocytosis with the help of finger-like projections called pseudopodia (Pseudo means false; podia means feet). The flexibility of the plasma membrane enables amoeba to use pseudopodia to engulf food and other material from its environment.

Question. Ligaments and Tendons are formed of a) Epithelial tissue b) Cartilage c) Muscular tissue d) Connective tissue

(d) Connective tissue Explanation: Two bones can be connected to each other by another type of connective tissue called the ligament. Tendons connect bones to muscles and are another type of connective tissue.

Question. Fill in the gap using given analogy.(i) Momentum conservation : F = 0 (ii) Uniform motion in rough surface : _________. a) Non-zero force b) Frictional force c) Gravitational force d) Internal force

(b) Frictional force Explanation: Any object which face non zero force will have some change in speed if the body is at rest or moving. So it is not possible to travel with constant speed. The forces can do work against each other. For example, you could push the object at constant speed over a rough surface. The net force on the object is zero.

Question. A jet engine works on the principle of Newton’s: a) second law of motion b) first law of motion c) none of these d) third law of motion

(d) third law of motion Explanation: The jet engine sucks air in at the front with a fan. A compressor raises the pressure of the air. The compressor is made with many blades attached to a shaft. The blades spin at high speed and compress or squeeze the air. The compressed air is then sprayed with fuel and an electric spark lights the mixture. The burning gases expand and blast out through the nozzle, at the back of the engine. As the jets of gas shoot backward, the engine and the aircraft are thrust forward (Newton’s third law of motion).

Question. The particles of the colloidal solution are: a) visible with a powerful microscope b) not visible with a powerful microscope c) visible with the naked eye d) visible with a simple microscope

(a) visible with a powerful microscope Explanation: The size of particles of the colloidal solution lies between 10 -7 cm to 10 -4 cm in diameter. So, The particles of colloidal solutions are visible with a powerful microscope.

Question. A eukaryotic nucleus has a: a) non-porous, single membrane b) porous, single membrane c) porous, double membrane d) non-porous, double membrane

(c) porous, double membrane Explanation: The bounding structure of the eukaryotic nucleus. Composed of two phospholipid bilayers with the outer one connected to the endoplasmic reticulum. Double membrane structure riddled with pores that surround deoxyribonucleic acid in eukaryotes. The nuclear pores, like guards at an important government building, are very strict.

Question. Which connective tissue supports and provides flexibility to the body parts? a) Tendon b) Bone c) Cartilage d) Ligament

(c) Cartilage Explanation: Cartilage is a connective tissue that provides support and flexibility to the body parts. It smoothens bone surfaces at joints. It is also present in the nose, ear, trachea, and larynx.

Question. The maximum speed of a train is 90 km/h. It takes 10 hours to cover a distance of 500 km. The ratio of its average speed to maximum speed is: a) 9:5 b) 5:9 c) 1: 5 d) 5:1

(b) 5:9 Explanation: Average speed = 500/10 = 50 km/hr Ratio of average speed to maximum speed = 50 : 90 = 5:9

Question. When no external force acts on an object, the physical quantity that remains conserved is a) force b) momentum c) acceleration d) velocity

(b) momentum Explanation: Momentum remains conserved in absence of any external force. Momentum is the product of the mass and velocity of an object. It is a three-dimensional vector quantity, possessing a magnitude and a direction.

Question. Which of the following chemicals are used to observe the presence of starch in the food extract? a) Conc. HCl b) Conc. H 2 SO 4 c) I 2 solution (Iodine) d) Benedict’s reagent

(c) I 2 solution (Iodine) Explanation: Many different food groups contain a carbohydrate known as starch. Using an iodine solution, you can test for the presence of starch. When starch is present, the iodine changes from brown to blue-black or purple.

Question. The primary function of smooth endoplasmic reticulum in liver cells is: a) detoxification b) protein synthesis c) carbohydrate metabolism d) catabolism of proteins

(a) detoxification Explanation: Smooth Endoplasmic Reticulum (SER) is responsible for the synthesis and repair of membranes. It also has a detoxification function.

Question. The dead element present in the phloem is a) phloem parenchyma b) phloem fibres c) sieve tubes d) companion cells

(b) phloem fibres Explanation: Phloem fibres are thick walled, elongated spindle shaped dead cells which possess narrow lumen. They provide mechanical support to the tissue. Phloem parenchyma are thin walled-living cells of parenchyma. They have two functions, storage and lateral food conduction.

Question. A moving body is covering a distance directly proportional to the square of time. The acceleration of the body is: a) constant b) zero c) increasing d) decreasing

(a) constant Explanation: Displacement is proportional to square of time s is displacement and t is time then, s ∞ t 2 s = kt 2 velocity(v) = 2kt Acceleration(a) = 2k = constant. So, the motion of the body is constant acceleration.

Question. Rocket works on the principle of conservation of a) mass b) velocity c) energy d) momentum

(d) momentum Explanation: Rocket works on the conservation of momentum. In a rocket, the fuel burns and produces gas at high temperature. These gases are ejected out of the rocket from a nozzle at the back side of the rocket. The ejecting gas exerts a forward force on the rocket which help in accelerating. Through the mass of gases escaping per second is very small and their momentum is very large due to their tremendous velocity of escape. An equal and opposite momentum is imparted to the rocket which despite its large mass builds up a high velocity.

Question. The membrane of the Golgi apparatus has connections with those of: a) nuclear membrane b) endoplasmic reticulum c) cell membrane d) mitochondria

(b) endoplasmic reticulum Explanation: The Golgi apparatus functions as a factory in which proteins received from the Endoplasmic reticulum are further processed and sorted for transport to their eventual destinations: lysosomes, the plasma membrane, or secretion.

Question. Which cell does not have perforated cell wall? a) Companion cells b) Vessels c) Trachieds d) Sieve tubes

(a) Companion cells Explanation: Tracheids and vessels are xylem elements and are concerned with the transport of water. They are long tube-like structures with partially or completely dissolved walls to form water pipes (in vessels) and pits in cell wall (in tracheids) for conducting water. Sieve tubes are slender tube-like structures with their end walls perforated by numerous pores and are called sieve plates. They are phloem elements and are main food conducting elements. Companion cells possess numerous mitochondria and ribosomes and are supporting units of sieve tubes.

Question. The part marked ‘X’ in the diagram is

a) vacuole b) simple pit pair c) narrow lumen d) intercellular space

(b) simple pit pair Explanation: The part marked ‘X’ in the diagram is simple pit pair. In the pair of simple pits of two adjacent cells, each simple pit is more or less uniform-diameter void in the walls. Cell wall contains simple pits. In simple pits the width of the pit chamber is uniform. There is no secondary wall in the simple pit.

Question. Animal cell lacking nuclei would also lack in: a) Chromosome b) Endoplasmic Reticulum c) Ribosome d) Lysosome

(a) Chromosome Explanation: An animal cell that does not contain nuclei will also lack chromosomes. Chromosomes are present inside the nucleus of a cell. Chromosomes contain information for the inheritance of features from parents to the next generation in the form of DNA (Deoxyribose Nucleic Acid) molecules.

Question. Find the correct statement: A. The SI unit of retardation is -ms -2 B. The motion of the athletes is uniform C. Displacement is a scalar quantity D. Velocity has magnitude only a) (B) b) (A) c) (D) d) (C)

(b) (A) Explanation: If there is a decrease in acceleration, it is called Retardation. This means the rate of decrease in velocity is called Retardation. The negative acceleration is termed retardation or deceleration. SI unit of acceleration (a) is m/s 2 or ms -2 . So, the unit of retardation is -ms -2 .

Question. Assertion (A): When astronauts throw something in space, that object would continue moving in the same direction and with the same speed. Reason (R): The acceleration of an object produced by a net applied force is directly related to the magnitude of the force, and inversely related to the mass of the object. a) Both A and R are true and R is the correct explanation of A. b) Both A and R are true but R is not the correct explanation of A. c) A is true but R is false. d) A is false but R is true.

(b) Both A and R are true but R is not the correct explanation of A. Explanation: Both A and R are true but R is not the correct explanation of A.

Question. Assertion (A): A fruit when unripe is green but it becomes beautifully coloured when ripe. Reason (R): The fruit becomes beautifully coloured due to Chromoplasts change to chloroplasts. a) Both A and R are true and R is the correct explanation of A. b) Both A and R are true but R is not the correct explanation of A. c) A is true but R is false. d) A is false but R is true.

(c) A is true but R is false. Explanation: A fruit when unripe is green but becomes beautifully coloured when ripe. This colour change is due to the change of chloroplasts into chromoplast.

Question. Assertion (A): The cells of non-striated muscles or smooth muscles are spindle-shaped, uninucleated, elongated, and have no striations. Reason (R): They are found within the walls of elementary canal, bladder, and blood vessels. a) Both A and R are true and R is the correct explanation of A.b) Both A and R are true but R is not the correct explanation of A. c) A is true but R is false. d) A is false but R is true.

(b) Both A and R are true but R is not the correct explanation of A. Explanation: The cells of non-striated muscles or smooth muscles are spindle-shaped, uni-nucleated, elongated, and have no striations. They are involuntary in nature. The non-striated muscles or smooth muscles are found within the walls of the elementary canal, bladder, and blood vessels.

Question. Assertion (A): If a particle is moving with constant velocity, then the average velocity for any time interval is equal to instantaneous velocity. Reason (R): If average velocity of a particle moving on a straight line is zero for a given time interval, then instantaneous velocity at some instant within this interval may be zero. a) Both A and R are true and R is the correct explanation of A. b) Both A and R are true but R is not the correct explanation of A. c) A is true but R is false. d) A is false but R is true.

(b) Both A and R are true but R is not the correct explanation of A. Explanation: Average velocity V av

= Instantaneous velocity Hence, assertion is correct. If a particle is in a round trip on a straight line, then average velocity is zero but at the instant at which the particle reverses its direction of motion, velocity is zero. So, reason is correct. But reason is not the correct explanation of assertion.

Question. Assertion (A): If the plasma membrane ruptured the entire cell content (cytoplasm, cell organelles)will be lost and the cell will die. Reason (R): In animals, active transport of potassium is done within a body for protein synthesis. a) Both A and R are true and R is the correct explanation of A. b) Both A and R are true but R is not the correct explanation of A. c) A is true but R is false. d) A is false but R is true.

(c) A is true but R is false. Explanation: Plasma membrane makes a boundary around the cell content. If it is ruptured the entire cell content (cytoplasm, cell organelles)will be lost and cell will die.

Question. A mixture of iron filings and sulphur is heated in a hard boiling tube. Which of the following will be observed? a) Iron will melt first b) Sulphur will melt first c) The mixture becomes red hot without melting d) Mixture sublimes

(b) Sulphur will melt first Explanation: When we start heating a mixture of iron filing and sulphur, the sulphur melts reacting exothermically (that is with the production of heat) with the iron filings to form the compound Iron (II) sulfide. The compound formed has properties that are different from both sulfur and iron. For instance, the compound does not have the magnetic properties of iron, and thus a magnet that could have easily separated iron nails and sulphur initially, will not be able to separate iron and sulphur from Iron (II) sulphide.

Question. A student took 5 g of powdered arhar dal in a test tube and added 5 ml water into it. She shook the test tube vigorously. After adding a few drops of HCl she observed that the dal tested positive for adulteration with metanil yellow. The observation she noted was : a) the water turned brown b) the water turned pink c) the water turned blue-black d) there was no colour change in the water

(b) the water turned pink Explanation: Metanil yellow is a synthetic dye which is not permitted to use as a food colour. However, it is extensively used to give a yellow colour to dal and turmeric. It is toxic in nature and it has adverse effects on intestine and brain. Presence of metanil yellow can be tested in dal by adding a few drops of hydrochloric acid to test sample. Of the test solution turns pink in colour, it indicates of mentanil yellow.

Question. The columnar epithelial cells possess cilia in a) intestine b) digestive tract c) stomach d) respiratory tract

(d) respiratory tract Explanation: Columnar epithelium in the intestine and columnar epithelium with cilia in the lining of the respiratory tract.

Question. Action reaction forces act: a) on the same body b) on different bodies c) in the same direction d) along different bodies

(b) on different bodies Explanation: Reaction from a body is caused due to action of some another body on it.

Question. Fireman holds a hose by exerting a _____. a) momentum b) friction c) force d) an acceleration

(c) force Explanation: Fireman holds a hose by exerting a force because equal and opposite force acts on him. To counter that force he needs to hold the hose with force.

Question. Which of the following is known as the “physical basis of life”? a) Nucleolus b) Mitochondria c) Gene d) Protoplasm

(d) Protoplasm Explanation: Protoplasm According to Huxley is the physical basis of life. Inside the cell wall of living cells, the living substance is known as protoplasm and it is a thick fluid or jellylike substance in texture.

Question. The epithelium is separated from the underlying connective tissue by a) thick deposition of fat b) mucosa c) vesicles d) basement membrane

(d) basement membrane Explanation: Epithelial tissues are physically separated from underlying connective tissues by a basement membrane or basal lamina. The portion of an epithelial cell attached to the basement membrane is called its basal surface.

Question. The one which has the least inertia among the following: 1 kg stone, 2 kg ball, a train compartment and a cup of tea is a) 2 kg ball b) 1 kg stone c) a train compartment d) a cup of tea

(d) a cup of tea Explanation: Inertia is directly proportional to mass and one which poses least resistance also possess least inertia.

Question. The components of compound can be separated by using a) chemical method b) physical method c) none of these d) cannot be separated by using any method.

(a) chemical method Explanation: The components of compound can be separated by chemical methods only because they have undergone chemical changes while formation which is physically irreversible.

Question. Which of the following are homogeneous in nature i. ice ii. wood iii. soil iv. air a) (iii) and (iv) b) (i) and (iii) c) (i) and (iv) d) (ii) and (iv)

(c) (i) and (iv) Explanation: A mixture is said to be a homogeneous mixture if its constituents are distributed uniformly and are not physically distinct. Wood and soil are heterogeneous mixtures. Ice is made up of water and water is a pure compound. Air is a mixture of various gases. Ice and air are homogeneous in nature.

Question. Which of these options are not a function of Ribosomes? i. It helps in manufacture of protein molecules ii. It helps in manufacture of enzymes iii. It helps in manufacture of hormones iv. It helps in manufacture of starch molecules a) (iii) and (iv) b) (iv) and (i) c) (i) and (ii) d) (ii) and (iii)

(a) (iii) and (iv) Explanation: Ribosomes are involved in protein synthesis. Enzymes are also proteins. Hence, ribosomes also make enzymes.

Question. On observing onion peel slide under low power of compound microscope which set of structures are clearly seen. a) Nucleus, cell membrane, vacuole, chromosomes b) Cell Wall, vacuole, nucleus, cytoplasm c) Cell wall, cell membrane, mitochondria, vacuole d) Cell wall, nucleus, vacuole, chromosomes.

(b) Cell Wall, vacuole, nucleus, cytoplasm Explanation: i. There are a large number of regularly shaped cells lying side by side and each cell has a distinct cell wall. ii. A distinct nucleus is present on the periphery of each cell. iii. A lightly stained cytoplasm is observed in each cell. iv. A large vacuole is present at the center of each cell and is surrounded by the cytoplasm.

Question. Parenchyma cells are a) doubled walled and specialised b) thick walled and specialised c) lignified d) relatively unspecified and thin walled

(d ) relatively unspecified and thin walled Explanation: Parenchyma cells form the bulk of the plant body. Its cells are living and they possess the power of division. The cells are rounded or isodiametric, i.e., equally expanded on all sides. The cells are oval, round, polygonal or elongated in shape with a thin cell wall. It encloses a dense cytoplasm, which contains small nucleus and surrounds large central vacoule.

Question. Following questions are based on the given text. Read the text carefully and answer the the given text. Read the text carefully and answer the

A solution that has dissolved as much solute as it is capable of dissolving, is said to be a saturated solution. In other words, when no more solute can be dissolved in a solution at a given temperature, it is called a saturated solution. If the amount of solute contained in a solution is less than the saturation level, it is called an unsaturated solution. Chromatography is the technique used for the separation of those solutes that dissolve in the same solvent. The principle is that immiscible liquids separate out in layers depending on their densities. Sublimation is also used to separate substance.

Question. The concentration of a solution is expressed by a) Mass by volume percentage of a solution b) Mass by mass percentage of a solution c) Volume by volume percentage of a solution d) All of these

(d) All of these Explanation: All of these

Question. Chromatography is used to seperate a) Colours in a dye b) Drugs from the blood c) Pigments from natural colours d) All of these

Question. Which of the given methods would you use to separate cream from milk? a) Filtration b) Distillation c) Fractional distillation d) Centrifugation

(d) Centrifugation Explanation: Centrifugation

Question. The amount of solute present per unit volume or per unit mass of the solution/solvent is known as a) The concentration of a solvent b) The concentration of a solute c) The concentration of a solution d) The composition of the solute

(c) The concentration of a solution Explanation: The concentration of a solution

Plant cells, in addition to the plasma membrane, have another rigid outer covering called the cell wall. The cell wall lies outside the plasma membrane. The plant cell wall is mainly composed of cellulose. The nucleus has a double-layered covering called a nuclear membrane. The nuclear membrane has pores that allow the transfer of material from inside the nucleus to its outside, that is, to the cytoplasm. The nucleus contains chromosomes, which are visible as rod-shaped structures only when the cell is about to divide. Chromosomes contain information for the inheritance of characters from parents to the next generation in the form of DNA. The nucleus plays a central role in cellular reproduction, the process by which a single cell divides and forms two new cells.

Question. Cellulose is a complex substance which provides: a) both mechanical support and structural strength to plants b) mechanical support c) structural strength to plants d) None of these

(c) structural strength to plants Explanation: structural strength to plants

Question. Chromosomes are made up of: a) Protein b) RNA c) DNA d) DNA and protein

(d) DNA and protein Explanation: DNA and protein

Question. Plasmolysis in a plant cell is defined as: I. breakdown (lysis) of the plasma membrane in hypotonic medium II. shrinkage of cytoplasm in hypertonic medium III. shrinkage of nucleoplasm IV. swelling of cytoplasm a) (IV) and (I) b) (II) and (III) c) (I) and (II) d) Only (II)

(d) Only (II) Explanation: Only (II)

Question. Identify (A) in the given diagram

a) nucleic acid b) nucleus c) nucleolus d) nucleoid

(d) nucleoid Explanation: nucleoid

In the velocity-time graph for the motion of the car. The nature of the graph shows that velocity changes by equal amounts in equal intervals of time. For all uniformly accelerated motion, the velocity-time graph is a straight line.

Question. The slope of a velocity-time graph gives a) the acceleration b) the speed c) the distance d) the displacement

(a) the acceleration Explanation: the acceleration

Question. Which of the following statement is correct regarding the velocity and speed of a moving body? a) The velocity of a moving body is its speed in a given direction. b) The speed of a moving body is always higher than its velocity. c) The velocity of a moving body is always higher than its speed. d) The speed of a moving body is its velocity in a given direction.

(a) The velocity of a moving body is its speed in a given direction. Explanation: The velocity of a moving body is its speed in a given direction.

Question. The following graphs shows: a) uniformly decelerated motion b) uniformly accelerated motion c) non- uniformly decelerated motion d) non-uniformly accelerated motion

(d) non-uniformly accelerated motion Explanation: non-uniformly accelerated motion

Question. If the displacement of an object is proportional to square of time, then the object moves with: a) uniform velocity b) uniform acceleration c) decreasing acceleration d) increasing acceleration

(b) uniform acceleration Explanation: uniform acceleration

We hope you liked the above Class 9 Science Sample Paper Term 1. Please let us know if you have any questions in the comments box below.

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Wonder of Science Essay 200 Words – PDF

20/12/2020 by thegkstudy

Wonder of Science Essay for Class 9th, 10th, 11th, 12th – 500 Words | Wonder of Science 10 Point | Essay on Wonder of Science 200 Words | Wonder of Science Essay 200 Words pdf | Wonder of Science Essay Class 10th MP Board | Wonder of Science Essay pdf | Wonder of science Essay Pdf | Wonder of Science Class 7th |

Wonder of Science Essay PDF

• Introduction ( प्रस्तावना )
• Medicine Field ( चिकित्सा के क्षेत्र में )
• Communication and Transport ( संचार और परिवहन )
• Electricity ( बिजली )
• Computer (कंप्यूटर)
• Atomic energy  ( परमाणु ऊर्जा )
• Disadvantage of science ( विज्ञान से हानियां)
• Conclusion ( उपसंहार )

Wonder of Science Essay 9th to 12th Pdf

1. Introduction (इंट्रोडक्शन)

• Today we are living in the age ( युग) of science.
• Science has been a good blessing ( आशीर्वाद) to making ( निर्माण) we line in this age.
• Today the whole world is developing rapidly ( तेजी से) in the field of science.
• Science has changed the way we live out lives.
• Science has become ( बनाना) an important part of our life.
• Science is nothing but a systematic ( व्यवस्थित) way of knowledge and living.

Wonder of Science Class 9th

2. Medicine Field ( चिकित्सा के क्षेत्र में )

• Science has made significant ( महत्वपूर्ण ) contribution in the field of medicine.
• Science has cured incredible diseases.
• Science treatment of many dangerous diseases ( बीमारी) has been possible.
• It has given wonderful medicine.
• Science has bright ( चमकदार) down the death rate.
• Modern surgical equipment have made operation less painful ( दर्दनाक) in the age of science.
• It is possible to transplantation ( प्रत्यारोपण) any organ of body.

Science in every day life Essay pdf Class 9th

3. Communication and Transport ( संचार और परिवहन )

• Bus, Cars, bikes, trains and air plane are the Biggest contribution ( योगदान) of science.
• It has facilitated ( सुविधा) entertainment though television and radio etc.
• Telephone and mobile phone all the the fastest personal means of communication ( संचार) .
• Television and internet has become a powerful medium of education and knowledge.

4. Electricity (इलेक्ट्रिसिटी)

• Electricity is the the wonderful invention ( आविष्कार) of science.
• it run our electric vehicle, train, factory, Mills, etc.
• it cool and keep warm ( गर्म)  and Home.
• Model life is not possible without electricity.
• It given us new cool entertain us throughout ( सभी जगह) TV and radio our home.

Wonder Of Science Essay 200 Words Pdf

5. Computer (कंप्यूटर)

• Computer all the great and wonderful invention ( आविष्कार) of science.
• They make complex and complicated ( उलझा हुआ) conclusion in fraction of a second.
• They have controlling ( नियंत्रित करना) machines, Satellites, television station, etc.
• Computer is using everywhere for example all office, school, College, Relve station, online shop, airport,  station, Hospital, Company, bank, etc.
• they have solved a lot of problems of human.

6. Atomic energy  ( परमाणु ऊर्जा )

• Science has discovered ( खोज करना) nuclear energy.
• The invention of atomic energy has contributed ( योगदान देना) significantly ( पर्याप्त) to the development of the country.
• It can meet the energy demands for a long time.

7. Disadvantage of science ( विज्ञान से हानियां)

• Everything has two side one profit and second loss.
• They can destroy ( समाप्त करना) millions warrior in a few second.
• The pollution caused by it causes great damage to the atmosphere ( वायुमंडल) .
• Atoms bumps, hydrogen Bums and other dangerous weapon are great two existence of women being.
• This Can destroy the world with in seconds.
• It is difficult to get pure water and air.

वंडर ऑफ साइंस निबंध इंग्लिश

8. Conclusion ( उपसंहार )

• Science is the greatest helper of the modern word.
• its misuse ( दुरुपयोग) is like poison for all mankind.
• It may be dangerous for human being but it is right use can change our earth into heaven.
• Its use limited and as long as it is appropriate for us.
• so we can that science is a good servant.

Wonder of Science Essay | Wonder of Science 10th Class Essay | Wonder of Science Essay pdf | Essay on Science in every day life | Science Essay pdf |

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Hindi Essay –

• पर्यावरण प्रदूषण पर निबंध
• हिंदी के महत्व पर निबंध
• छात्र अनुशासन पर निबंध
• स्वच्छता पर निबंध
• स्थानांतरण प्रमाण पत्र हेतु आवेदन पत्र
• मित्र को विवाह में आमंत्रण के लिए पत्र
• प्रथम श्रेणी में उत्तीर्ण होने पर मित्र को बधाई पत्र

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Wonder of Science Essay 2023 | Essay on Wonder of Science for class 9, 10, 11,12

September 20, 2022 by board12th Leave a Comment

Wonder of Science Essay 2023 | Essay on Wonder of Science for class 9, 10, 11,12 | Wonder of Science Essay | Essay on Wonder of Science for class 9, 10, 11,12 easy and short essay | Science in Our daily life essay | wonder of science essay 500 word 250 words download in hindi. essay wonder of science short essay. wonder of science essay 350 words, 450 words | wander of science | wonder off science ka nibandh | wonder of science class 10th | Wonder of science ka nibandh | wonder off science nibandh | wander off science.

Wonder of Science Essay 

• Introduction 
• Scientific Invention 
• Atomic Energy 
• Means of Communication 
• Disadvantages of Science 
• How to Control Disadvantages of Science
• Surgery and medicine 
• Conclusion 

1- Introduction – Science is playing important role in over life. There are many wonder of Science and the great invention of science. It is age of science. science is made over life comfortable and easier. It has nothing but systematic way of living and the knowledge. Alertness and curiosity  and observation changes in over life happenings has give to science.

2- Scientific Inventions – Science has been invented many things and the invented small machine big machine and the other things and observation very easy and simple events. Idea of Railway engine is a depending on water boiling. Gravity Discovered by the Newton form the siting of apple tree.

3- Atomic Energy – Atomic energy discovery of Science the whole world man has harnessed an inexhaustible resources of energy.  Science greatest invention is electricity. Electricity runs trains and factories and cool our home hot water gives us cinemas for the entertainment TV Radio and the light give the science.

4- Means Of Communication – Trans, Buses, Cars and the Ships are the big and the greatest invention of science and the greatest contribution. Man can read the long distance place within hour just because of science. Man can go to the other planet just because of science.

5- Disadvantages of Science – There are many disadvantage of science. Everything is two sides one is dark side and second is invention production and the atom bombs. Dangerous weapons can destroy all things within second. we can get to pure air and water is very difficult.

Wonder of Science Short Essay

6- How to control disadvantages of Science – Disadvantages control by the only create a healthy atmosphere and Environment we can treat to the humanity control. All men and the women have brotherly affection. Control the wars, planting trees clean our environment.

7- Medical and Surgery – Science has not only cured man for the deadly Diseases, science has lengthened her age and mad her healthier. Science is the field of surgery wonder of science. brain surgery and the heat surgery done only because of science. Heart transplant is a ordinary things today just because of science.

8- Computer – wonderful invention of science is called Computer. Human helped computer in the various fields. Computer can solve the complicated problems within second calculation in a fraction within second. Computer control big size machine rocket and the satellites.

9- Conclusion –   Our great helper is science and science has been give use many gifts. If we use the gift properly it can make our life easy and healthier/happier. Science is called master of the whole world.

Watch wonder of science essay on youtube Mp Board 10th Question paper 

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CBSE Class 12 Political Science Answer Key 2024 and Question Papers, Download PDF All SETs

Cbse class 12 political science answer key 2024: download the cbse class 12 political science board exam 2024 answer key for sets 1, 2, and 3 of the question paper. get answers curated by subject experts to assess your performance in the cbse class 12 political science exam 2024. .

CBSE Class 12 Political Science Answer Key 2024:  The Central Board of Secondary Education (CBSE) Examination for Class 12 students for the academic year 2023–24 has begun. Today, the board successfully conducted the class 12 Political Science exam from 10.30 a.m. to 1.30 p.m. In this article, We have provided  answers to all the questions of CBSE Class 12 Political Science to help students assess their performance in the exam by checking the correct answers. The CBSE Class 12 Political Science Answer Key 2024 for Sets 1, 2, and 3 is available here. You can also check the exam analysis and all sets of the question paper in PDF format. 

CBSE Class 12 Political Science Paper Answer Key 2024 

Q. Arrange the following events in chronological order and choose the correct option as answer: (i)  Indo-Russian Strategic Agreement (ii) The Soviet invasion of Afghanistan (iii) Disintegration of the Soviet Union (iv) Socialist Revolution in Russia (A) (i), (ii), (iii), (iv) (B) (ii), (iv), (iii), (i) (C) (iv), (ii), (iii), (i) (D) (iii), (i), (ii), (iv)

Answer.  (C) (iv), (ii), (iii), (i)

Q. Which one of the following was formed for the planned development of India, just after independence?

(A) Election Commission (B) Planning Commission (C) Shah Commission (D) NITI Aayog

Answer. (B) Planning Commission

Q.  Which one of the following Princely States of India initially opposed joining the Indian Union? (A) Baroda (B) Hyderabad (C) Mysore (D) Gwalior

Answer: (B) Hyderabad

Q. Which one of the following encourages the use of renewable energy? (A) Energy Conservation Act (B) Environment Protection Act (C) Electricity Act (D) National Auto Fuel Policy

Answer. (C) Electricity Act

Q. Planning Commission of India was replaced with NITI Aayog because (A) it had become very old. (B) it was becoming irrelevant to face the new challenges of development. (C) it was totally based on Socialist model. (D) many states were not in favour of Planning Commission.

Answer. (B) it was becoming irrelevant to face the new challenges of development.

Q. In the following question, a statement of Assertion (A) is followed by a statement of Reason (R). Choose the correct option as answer. Assertion (A): People started protesting against the increase in prices of essential commodities, food scarcity and growing unemployment before the fourth General elections in India. Reason (R): Failure of monsoons, widespread drought, decline in agricultural production and serious food shortage caused the problem.

Options: (A) Both the Assertion (A) and the Reason (R) are correct and the Reason (R) is the correct explanation of the Assertion (A). (B) Both the Assertion (A) and the Reason (R) are correct, but the Reason (R) is not the correct explanation of the Assertion (A). (C) The Assertion (A) is correct, but the Reason (R) is incorrect.

(D) The Assertion (A) is incorrect, but the Reason (R) is correct.

Answer.  (A) Both the Assertion (A) and the Reason (R) are correct and the Reason (R) is the correct explanation of the Assertion (A).

Q. Which one of the following developing countries was the first to successfully control the rate of growth of population? (A) India (B) Pakistan (C) Nepal (D) Sri Lanka

Answer. (D) Sri Lanka

Q. After the death of Lal Bahadur Shastri, there was an intense competition for the post of Prime Minister between Indira Gandhi and which one of the following? (A) Morarji Desai (B) K. Kamraj (C) S. Nijalingappa (D) V.V. Giri

Answer.(A) Morarji Desai

Q.  In the following question, a statement of Assertion (A) is followed by a statement of Reason (R). Choose the correct option as answer. Assertion (A): Presently the global atmosphere is warming up.

Reason (R): A steady decline in the total amount of Ozone in the earth's stratosphere. Options: (A) Both the Assertion (A) and the Reason (R) are correct, and the Reason (R) is the correct explanation of the Assertion (A). (B) Both the Assertion (A) and the Reason (R) are correct, but the Reason (R) is not the correct explanation of the Assertion (A). (C) The Assertion (A) is correct, but the Reason (R) is incorrect. (D) The Assertion (A) is incorrect, but the Reason (R) is correct.

Answer. (A) Both the Assertion (A) and the Reason (R) are correct, and the Reason (R) is the correct explanation of the Assertion (A).

Q. Which event marked the end of Communism in the Soviet Union? (A) Cuban Missile Crisis (B) Rise of New World Order (C) Disintegration of the Soviet Union (D) Rise in US economy

Answer. (C) Disintegration of the Soviet Union

Q. Name the state from which Chhattisgarh was carved out. (A) Uttar Pradesh (B) Bihar (C) Jharkhand (D) Madhya Pradesh

Answer. (D) Madhya Pradesh

*Answers to the remaining question will be provided here soon. 

CBSE Class 12 Political Science Marking Scheme 2024 

Cbse class 12 result date 2024 .

CBSE Class 12 Board Exam Results for the academic session 2023–24 are expected to be declared in May 2024. You will be able to check your CBSE Class 12 results by clicking on the links mentioned below:

Also Read: 

CBSE Class 12 Political Science Question Paper 2024 Download PDF 

CBSE Class 12 Syllabus 2023-2024 (All Subjects)

CBSE Class 12 Sample Paper 2023-2024 (All Subjects)

CBSE Class 12 Practice Papers 2023-2024

NCERT Solutions for Class 12 (All Subjects and Chapters)

Important Questions for Class 12 Board Exam 2024 (All Subjects)

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CBSE Class 10 Science Answer Key 2024, Board Paper All Sets

After the conclusion of the Exam, students can check CBSE Class 10 Science Answer Key 2024 to verify their responses. Check science answer key class 10 2024 prepared by Adda247 Experts on this page

Table of Contents

CBSE Class 10 Science Paper is now over. The exam was held for three hours, from 10:30 a.m. to 1:30 p.m. There were no questions determined to be outside of the syllabus. Approximately 60-70% of the questions were directly from the textbook. Students must be keen to find out how they performed following the exam. Students can refer to the Class 10 Science Answer Key 2024, which our expert faculties have explained in depth below.

We provide genuine and explanatory answers to each question answered in the Class 10 Science Examination 2024. Instead of visiting many websites, stay with us and compare your answers to the CBSE Class 10 Science Answer Key 2024 provided on this page.

Class 10 Science Answer Key 2024

 CBSE Class 10 Science Answer Key 2024 provided on this page is error-free and prepared by the expert faculties of Adda247. Using the Class 10 Science Answer Key 2024, students may compare their answers to all of the questions they attempted on the exam and predict their scores. If you took your Class 10 Science Exam on March 2, 2024, you should stay tuned with us so that you do not miss the update of the Science Class 10 Answer Key 2024.  Our in-house experts have also shared the Class 10 Science Exam Analysis for discussing the Science Question Paper.

Science Answer Key Class 10 2024: Overview

The CBSE Class 10 Science exam is held on 2nd March between 10:30 and 01:30. After the completion of the examination, The students can check the CBSE Class 10 Science Answer key 2024 along with Paper Analysis here. Let’s take a quick overview of the Science answer key class 10 2024. 

Science Class 10 Board Paper 2024: Pattern

When analyzing the science class 10 board paper 2024, the CBSE Class 10 Exam 2024 has a total of 100 marks, with the theoretical paper accounting for 80 of them and the internal evaluations accounting for the remaining 20. The CBSE Class 10 Science Question Paper 2024 has 80 marks and lasts three hours. Students have an additional 15 minutes to peruse the question paper. The CBSE science class 10 board paper 2024 consists of 39 questions divided into five sections:

Class 10 Science Board Paper 2024: Analysis

In CBSE class 10 science board paper 2024 analysis, we evaluate the question paper based on errors in questions, out-of-syllabus questions, and the difficulty level of the question paper. Class 10 science board paper 2024 Analysis can help you understand the relative emphasis on different aspects of the syllabus and how difficult the exam was compared to your expectations.

According to the students, the science paper for the class 10 board examination was moderately easy to average. There were no questions determined to be outside of the syllabus. Approximately 60-70% of the questions were directly from the textbook.The CBSE Class 10 Science Board Paper Analysis by section is shared below

Class 10 Science Answer Key 2024 All Sets 1, 2, 3

Science is one of the most difficult topics for many pupils. After the exam, students should look for the correct answers to each question in the CBSE Class 10 Science paper. Adda247 Experts are constantly drafting the CBSE Class 10 Science Answer Key 2024. Following the exam, you can utilize the Question Paper Solution to confirm all of the correct answers here.

Class 10 Science Answer Key 2024 Set 1: Paper Code ( 31/5/1)

SECTION A Select and write the most appropriate option out of the four options given for each of the questions no. 1 to 20. 20×1=20

Answer: (C) 2, 2, 4

2. Which of the following is a redox reaction, but not a combination reaction? (A) C+O2→ CO2 (C) 2 Mg + O2 → 2 MgO (B) 2.H2 + O2 2 H₂O (D) Fe2O3+3 CO→ 2Fe + 3 CO2

3. The salt present in tooth enamel is: (A) Calcium phosphate (C) Sodium phosphate (B) Magnesium phosphate (D) Aluminium phosphate

4. An aqueous solution of sodium chloride is prepared in distilled water. The pH of this solution is : (A) 6 (C) 7 (B) 8 (D) 3

5. A metal ‘X’ is used in thermit process. When ‘X’ is heated with oxygen, it gives an oxide ‘Y’, which is amphoteric in nature. ‘X’ and ‘Y’ respectively are: (A) Mn, MnO2 (B) Al, Al2O3 (C) Fe, Fe2O3 (D) Mg, MgO

6. The process in which transport of soluble products of photosynthesis takes place in plants is known as: (A) Transpiration (C) Conduction (B) Evaporation (D) Translocation

Answer: (D) Translocation

7. The correct sequence of events when someone’s hand touches a hot object unconsciously: (A) Receptors in skin → Motor neuron → Relay neuron → Sensory neuron Effector muscle in arm (B) Receptors in skin → Relay neuron → Sensory neuron → Motor neuron Effector muscle in arm (C) Receptors in skin → Sensory neuron → Relay neuron → Motor neuron Effector muscle in arm (D) Receptors in skin → Sensory neuron Effector muscle in arm → Motor neuron → Relay neuron

Answer: (C) Receptors in skin → Sensory neuron → Relay neuron → Motor neuron Effector muscle in arm

8. Sense organ in which olfactory receptors are present is: (A) Nose (B) Skin (C) Tongue (D) Inner ear

Answer: (A) Nose

9.The incorrect statement about placenta is: (A) It is a disc embedded in the uterine wall. B) ( It contains villi on the embryo’s side of the tissue. (C) It has a very small surface area for glucose and oxygen to from mother to the embryo. (D) The embryo gets nutrition from the mother’s blood through it.

Answer: (C) It has a very small surface area for glucose and oxygen to from mother to the embryo.

10. Select from the following the conditions responsible for the rapid sp of bread mould on a slice of bread: (i) Formation of large number of spores (ii) Presence of moisture and nutrients in bread (iv) Presence of hyphae (A) (i) and (ii) (B) (ii) and (iv) (C) (ii) and (iii) (D) (iii) and (iv)

Answer: (A) (i) and (ii)

11. How will the image formed by a convex lens be affected, if the upper half of the lens is wrapped with a black paper? (A) The size of the image formed will be one-half of the size of the image due to complete lens. (B) The image of upper half of the object will not be formed. (C) The brightness of the image will reduce. (D) The lower half of the inverted image will not be formed.

Answer: (C) The brightness of the image will reduce.

For Questions number 17 to 20, two statements are given one labelled as Assertion (A) and the other labelled as Reason (R). Select the correct answer to these questions from the codes (A), (B), (C) and (D) as given below. (A) Both Assertion (A) and Reason (R) are true and Reason (R) is the correct explanation of the Assertion (A). (B) Both Assertion (A) and Reason (R) are true, but Reason (R) is not the correct explanation of the Assertion (A). (C) Assertion (A) is true, but Reason (R) is false. (D) Assertion (A) is false, but Reason (R) is true.

17. Assertion (A): Some vegetable oils are healthy. Reason (R): Vegetable oils generally have long unsaturated carbon chains.

Answer: (B) Both Assertion (A) and Reason (R) are true, but Reason (R) is not the correct explanation of the Assertion (A).

18. Assertion (A): Sex of the children will be determined by what they inherit from their mother. Reason (R): Women have XX sex chromosomes.

Answer: (D) Assertion (A) is false, but Reason (R) is true.

19. Assertion (A): Electrons move from lower potential to higher potential in a conductor. Reason (R): A dry cell maintains electric potential difference across the ends of a conductor.

20. Assertion (A): Ozone layer protects the surface of the Earth from harmful UV radiations. Reason (R): Chlorofluorocarbons (CFCs) are responsible for depletion of ozone layer

SECTION B Questions no. 21 to 26 are verry short answer type questions.

21. (a) Copper powder is taken in a china dish and heated over a burner. Name the product formed and state its colour. Write the chemical equation for the reaction involved. OR (b) Write chemical equation for the chemical reaction which occurs when the aqueous solutions of barium chloride and sodium sulphate react together. Write the symbols of the ions present in the compound precipitated in the reaction.

22. The melting and boiling points of carbon compounds are generally low and they are largely non-conductors of electricity. State two conclusions based on these two properties. 23. (a) Sometimes while running, the athletes suffer from muscle cramps. Why? How is the respiration in this case different from aerobic respiration? OR (b) Write the other name given to lymph. State its two functions.

24. Some unicellular organisms such as Plasmodium and Leishmania differ in the manner in which they reproduce. Name and explain the reproductive process taking place in them.

25. The heat produced at a point due to concentration of sunlight by a convex lens burns a paper. (a) Explain why it happens. (b) Name the term (in the context of the lens used) given to the point at which the paper starts burning. What does the bright spot formed on the paper represent?

26. An electric source can supply a charge of 500 coulomb. If the current drawn by a device is 25 mA, find the time in which the electric source will be discharged completely.

Study the experimental set-up shown in the diagram and write chemical equation for the chemical reaction involved. Name and define the type of reaction. List two other metals which can be used in place of iron to show the same type of reaction with copper sulphate solution.

28. Name the ore of mercury and state the form in which it is found in nature. Write the chemical equations along with the condition required for the reactions involved in the extraction of mercury from its ore.

29. Taking the example of any two animal hormones along with their gland of secretion, explain how these hormones help (i) in growth and development and (ii) regulate metabolism, in the body.

30. Mendel crossed pure tall pea plants (TT) with pure short pea plants (tt) and obtained F₁ progeny. When the plants of F₁ progeny were self-pollinated, plants of F₂ progeny were obtained. (a) What did the plants of F₁ progeny look like? Give their gene combination. (b) Why could the gene for shortness not be expressed in plants of F₁ progeny? (c) Write the ratio of the plants obtained in F₂ progeny and state the conclusion that can be drawn from this experiment.

31. (a) Study the diagram given below and answer the questions that follow:

(i) Name the defect of vision depicted in this diagram stating the part of the eye responsible for this condition. (ii) List two causes of this defect. (iii) Name the type of lens used to correct this defect and state its role in this case.

(b) What is dispersion of white light? State its cause. Draw a diagram to show dispersion of a beam of white light by a glass prism.

32. (a) What happens when a bundle of wires of soft iron is placed inside the coil of a solenoid carrying a steady current ? Name the device obtained. Why is it called so? (b) Draw the magnetic field lines inside a current carrying solenoid. What does this pattern of magnetic field lines indicate?

33. Differentiate between food chain and food web. In a food chain consisting of deer, grass and tiger, if the population of deer decreases, what will happen to the population of organisms belonging to the first and third trophic levels?

Class 10 Science Answer Key 2024 Set 2: Paper Code (31/5/2)

1. Select from the following the conditions responsible for the rapid spread of bread mould on a slice of bread: (i) Formation of large number of spores (ii) Presence of moisture and nutrients in bread (iii) Low temperature (iv) Presence of hyphae (A) (i) and (ii) (B) (ii) and (iv) (C) (ii) and (iii) (D) (iii) and (iv)

2. The incorrect statement about placenta is: (A) It is a disc embedded in the uterine wall. (B) It contains villi on the embryo’s side of the tissue. (C) It has a very small surface area for glucose and oxygen to pass from mother to the embryo. (D) The embryo gets nutrition from the mother’s blood through it.

Answer: (C) It has a very small surface area for glucose and oxygen to pass from mother to the embryo. 3. An aqueous solution ‘A’ turns phenolphthalein solution pink. When another aqueous solution ‘B’ is added to the pink solution, the pink colour disappears. Now when a few drops of solution ‘A’ are added to this reaction, the mixture appears pink again. The respective changes in the nature of the solution are from:

(A) acidic basic → basic (B) basic acidic acidic (C) acidic basic acidic (D) basic acidic basic

Answer: (D) basic acidic basic

Answer: Option (C)

6. Which of the following is a redox reaction, but not a combination reaction? (A) C+O2→ CO2 + (B) 2H2+O2→2H₂OX (C) 2 Mg + O2 → 2 MgO (D) Fe2O3+3CO → 2Fe + 3 CO2 Answer: Option D

7. An aqueous solution of sodium chloride is prepared in distilled water. The pH of this solution is: (A) 6 (C) 7 (B) 8 (D) 3 Answer: Option (C) 7

1 1. Which one of the following is not a natural ecosystem? (A) Pond ecosystem (B) Grassland ecosystem (C) Forest ecosystem (D) Cropland ecosystem

Answer: (D) Cropland ecosystem

Answer: Option A

13. How will the image formed by a convex lens be affected, if the upper half of the lens is wrapped with a black paper? (A) The size of the image formed will be one-half of the size of the image due to complete lens. (B) The image of upper half of the object will not be formed. (C) The brightness of the image will reduce. (D) The lower half of the inverted image will not be formed

Answer:(C) The brightness of the image will reduce.

14, The phenomena of light involved in the formation of rainbow are: (A) Refraction, reflection and dispersion B) Refraction, dispersion and internal reflection (C) Reflection, dispersion and internal reflection D) Refraction, dispersion, scattering and total internal reflection

Answer: (C) Reflection, dispersion and internal reflection

15. The colour of light for which the refractive index of glass is minimum, is: (A) Red (C) Green (B) Yellow (D) Violet

Answer:(A) Red

16. The current carrying device which produces a magnetic field similar to that of a bar magnet is: (A) A straight conductor (C) A solenoid (B) A circular loop (D) A circular coil

Answer:(C) A solenoid

Class 10 Science Answer Key 2024 Set 3: Paper Code (31/5/3)

Answer:(C) It has a very small surface area for glucose and oxygen to pass from mother to the embryo.

3. An aqueous solution ‘A’ turns phenolphthalein solution pink. When another aqueous solution ‘B’ is added to the pink solution, the pink colour disappears. Now when a few drops of solution ‘A’ are added to this reaction, the mixture appears pink again. The respective changes in the nature of the solution are from: (A) acidic basic → basic (B) basic acidic → acidic (C) acidic basic acidic (D) basic acidic → basic

Answer: (D) basic → acidic → basic

4. The correct sequence of events when someone’s hand touches a hot object unconsciously : (A) Receptors in skin Motor neuron Relay neuron → Sensory neuron Effector muscle in arm (B) Receptors in skin Relay neuron Sensory neuron → Motor neuron Effector muscle in arm (C) Receptors in skin Sensory neuron Relay neuron→ Motor neuron Effector muscle in arm (D) Receptors in skin Motor neuron Sensory neuron Effector muscle in arm →Relay neuron

Answer: (C) Receptors in skin Sensory neuron Relay neuron→ Motor neuron Effector muscle in arm

9. The process in which transport of soluble products of photosynthesis takes place in plants is known as: (A) Transpiration (B) Evaporation (C) Conduction (D) Translocation

10. Sense organ in which olfactory receptors are present is: (A) Nose (B) Skin (C) Tongue (D) Inner

15. The colour of light for which the refractive index of glass is minimum, is: (A) Red (B) Yellow (C) Green (D) Violet

16. The current carrying device which produces a magnetic field similar to that of a bar magnet is: ( (A) A straight conductor (B) A circular loop (D) A circular coil (C) A solenoid

17. Assertion (A): Electrons move from lower potential to higher potential in a conductor. Reason (R): A dry cell maintains electric potential difference across the ends of a conductor.

18. Assertion (A): Some vegetable oils are healthy. Reason (R): Vegetable oils generally have long unsaturated carbon chains.

Answer: (B)

19. Assertion (A): Sex of the children will be determined by what they inherit from their mother. Reason (R): Women have XX sex chromosomes.

Answer: (D)

20. Assertion (A): Green plants trap only 1% of the energy of sunlight that falls on their leaves. Reason (R): All green plants are the producers in a food chain.

Answer Key of Science Class 10: MCQ’s Questions

Select and write the most appropriate option out of the four options given for each of the questions 1-20. There is no negative mark for the incorrect response.

1. When 2 mL of sodium hydroxide solution is added to a few pieces of granulated zinc in a test tube and then warmed, the reaction that occurs can be written in the form of a balanced chemical equation as:

(a) NaOH + Zn → NaZnO2 + H20 (b) 2NaOH + Zn → Na2ZnO2 + H2 (c) 2NaOH + Zn → NaZnO2 + H2 (d) 2NaOH + Zn → Na2ZnO2 + H2O

Answer: (b) 2NaOH + Zn → Na2ZnO2 + H2

2. Select from the following a decomposition reaction in which source of energy for decomposition is light: (a) 2FeSO4 → Fe203+ SO2+ SO3 (b) 2H2O → 2H2+ O2 (c) 2AgBr → 2Ag + Br2 (d) CaCO3 → CaO + CO2

Answer: (c) 2AgBr → 2Ag + Br2

3. A metal and a non-metal that exists in liquid state at the room temperature are respectively : (a) Bromine and Mercury (b) Mercury and lodine (c) Mercury and Bromine (d) Iodine and Mercury

Answer: (c) Mercury and Bromine

4. Carbon compounds: (i) are good conductors of electricity. (ii) are bad conductors of electricity. (iii) have strong forces of attraction between their molecules. (iv) have weak forces of attraction between their molecules.

The correct statements are: (a) (i) and (ii) (b) (ii) and (iii) (c) (ii) and (iv) (d) (i) and (iii)

Answer: (d) (i) and (iii)

5. Consider the following compounds : FeSO4; CuSO4; CaSO4; Na2CO3

The compound having maximum number of water of crystallisation in its crystalline form in one molecule is : (a) FeSO4 (b) CuSO4 (c) CaSO4 (d) Na2CO3

Answer: (d) Na2CO3 ; 10 water molecules

6. Oxides of aluminium and zine are : (a) acidic (b) basic (c) amphoteric (d) neutral

Answer: (c) amphoteric; behave as both acidic and basic oxides

7. MnO2 + 4HCI → MnCl2 + 2H2O + Cl2 The reaction given above is a redox reaction because in this case (a) MnO2 is oxidised and HCI is reduced. (b) HCI is oxidised. (c) MnO2 is reduced. (d) MnO2 is reduced and HCI is oxidised.

Answer: (d) MnO2 is reduced and HCI is oxidised; MnO2 loses its oxygen to form MnCl2 and HCl loses its H to form Cl2.

8. Consider the following statements (i) The sex of a child is determined by what it inherits from the mother. (ii) The sex of a child is determined by what it inherits from the father. (iii) The probability of having a male child is more than that of a female child. (iv) The sex of a child is determined at the time of fertilisation when male and female gametes fuse to form a zygote. The correct statements are : (a) (i) and (iii) (b) (ii) and (iv) (c) (iii) and (iv) (d) i), (iii) and (iv)

Answer: (b) (ii) and (iv)

9. Chromosomes : (i) carry hereditary information from parents to the next generation. (ii) are thread like structures located inside the nucleus of an animal cell. (iii) always exist in pairs in human reproductive cells. (iv) are involved in the process of cell division.

The correct statements are : (a) (i) and (ii) (b) (iii) and (iv) (a) (i), (ii) and (iv) (d) (i) and (iv) Answer: (a) (i) and (ii)

10. In a nerve cell, the site where the electrical impulse is converted into a chemical signal is known as : (a) Axon (b) Dendrites (c) Neuromuscular junction (d) Cell body

Answer: (c) Neuromuscular junction; a neuromuscular junction (or myoneural junction) is a chemical synapse between a motor neuron and a muscle fiber.

11. A stomata closes when: (i) it needs carbon dioxide for photosynthesis. (ii) it does not need carbon dioxide for photosynthesis. (iii) water flows out of the guard cells. (iv) water flows into the guard cells. The correct reason(s) in this process is/are : (a) (i) only (b) (i) and (iii) (c) (ii) and (iii) (d) (ii) and (iv) Answer: (c) (ii) and (iii);

12. At what distance from a convex lens should an object be placed to get an image of the same size as that of the object on a screen?

(a) Beyond twice the focal length of the lens. (b) At the principal focus of the lens. (c) At twice the focal length of the lens. (d) Between the optical centre of the lens and its principal focus.

Answer: (c) At twice the focal length of the lens;​

13. The lens system of human eye forms an image on a light sensitive screen, which is called as: (a) Cornea (b) Ciliary muscles (c) Optic nerves (d) Retina Answer: (d) Retina

Science Answer Key Class 10 2024: Paper Code 31/1/1

Check out science answer key class 10 2024 of Question Paper code 31/1/1

CBSE Science Question Paper 2024 PDFs

After Completion of the Exam, here we provided the CBSE Class 10 Science Question Papers 2024 PDF. Candidates may download Question Papers and analyze the Class 10 Science Answer key to calculate their expected scores.

Class 10 Science Paper 2024: Marking Scheme

Class 10 Science Paper 2024 comprises five sections for an overall score of 80. Check out the below mark distribution for the Class 10 Science Question Paper 2024

• Section A consists of 20 objective-type questions carrying 1 mark each.
• Section B consists of 6 Very Short questions carrying 02 marks each. Answers to these questions should be in the range of 30 to 50 words.
• Section C consists of 7 Short Answer type questions carrying 03 marks each. Answers to these questions should be in the range of 50 to 80 words
• Section D consists of 3 Long Answer type questions carrying 05 marks each. Answers to these questions should be in the range of 80 to 120 words.
• Section E consists of 3 source-based/case-based units of assessment of 04 marks each with sub-parts.

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Where can I get the Class 10 Science Answer Key 2024 Set 1?

The CBSE Class 10 Science Answer Key 2024 of all sets is shared on this page.

When CBSE Class 10 Science Exam takes place?

CBSE Class 10 Science Exam is scheduled to held on 2nd march form 10:30 A.M to 01:30 P.M.

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NCERT Solutions for Class 9 Science

Ncert solutions for class 9 science updated for 2023-24 free chapterwise pdf download.

NCERT Solutions for Class 9 Science help students to clear any doubts instantly and efficiently. These NCERT Solutions guide students to learn the important concepts which are included in the CBSE Class 9 Science syllabus. Students are required to solve the exercise questions included in the textbook to create a proper understanding of the topics.

While solving the textbook questions, doubts arise among students. The NCERT Solutions for Class 9 come in handy at such times, as they include precise explanations and detailed answers to those questions. These CBSE Science NCERT Solutions for Class 9 cover solutions to all the important chapters included in the textbook, like Matter, Atoms, Tissues, Living Organisms, Motion, Force, Laws of Motion, Gravitation, Energy and Work, Sound, Natural Resources, etc.

Along with answers to the textbook questions, these solutions provide you with extra questions, exemplar problems, the important questions from previous year question papers, sample papers , worksheets, MCQs, short answering questions, descriptive type questions, their solutions, as well as tips and tricks.

NCERT Solutions for Class 9 Science Chapter-Wise PDFs

NCERT Solutions for Class 9 Science are provided in a format for better accessibility to the students. These solutions serve as an important studying tool for students who are preparing for their board examinations and assignments.

NCERT Solutions of Class 9 Science Book Chapter Brief

Chapter 1: matter in our surrounding.

The Class 9 science textbook starts with the chapter “Matter in Our Surroundings”. Everything that we see around us is made up of material which is called matter. These things occupy space and have mass. Earlier, Indian philosophers had classified matter into 5 basic elements called Panch Tatva – air, water, earth, sky and fire. Now, modern scientists have come up with 2 types of classification, i.e., based on physical property and chemical nature. In this chapter, students will learn about the physical properties of matter .

The matter is made up of particles and these particulars are very small. The particles of matter have space between them, they are continuously moving and attract each other. The matter around us exists in 3 different states – solids, liquids and gases. These states of matter arise due to variation in the characteristic of the particles of matter. All the 3 states of matters have been explained in-depth with the help of activities. Further, the textbook explains that the state of matter is inter-convertible. The state of matter can be changed by changing temperature or pressure. The phenomenon of change of a liquid into vapour at any temperature below its boiling point is called evaporation. The rate of evaporation depends upon the surface area exposed to the atmosphere, the temperature, the humidity and the wind speed. Evaporation also causes cooling.

Topics Covered in Class 9 Science Chapter 1 Matter in Our Surrounding :

Definition of matter; solid, liquid and gas; characteristics – shape, volume, density; change of state –  melting (absorption of heat), freezing, evaporation (cooling by evaporation), condensation, sublimation.

Also access the following resources for Class 9 Chapter 1 Matter in Our Surrounding at BYJU’S:

• Matter in Our Surroundings Class 9 Notes – Chapter 1
• CBSE Class 9 Science Chapter 1 Matter in Our Surroundings Important Questions
• NCERT Exemplar Class 9 Science Solutions for Chapter 1 – Matter in Our Surroundings

Chapter 2: Is Matter Around Us Pure?

This chapter of NCERT Class 9 Science students will teach about mixtures, solutions, properties of solutions, separation of mixtures, and physical and chemical changes. Along with this, they will also learn about compounds and their properties, the difference between mixtures and compounds, the classification of matter, etc.

Topics Covered in Class 9 Science Chapter 2 Is Matter Around Us Pure?  :

Nature of matter: Elements, compounds and mixtures. Heterogeneous and homogenous mixtures, colloids and suspensions. Physical and chemical changes (excluding separating the components of a mixture).

Also, access the following resources for Class 9 Chapter 2 Is Matter Around Us Pure? at BYJU’S:

• CBSE Class 9 Science Chapter 2 Is Matter Around Us Pure? Notes
• Important Questions for CBSE Class 9 Science Chapter 2 – Is Matter Around Us Pure?
• NCERT Exemplar Class 9 Science Solutions for Chapter 2 – Is Matter Around Us Pure?

Chapter 3: Atoms and Molecules

In NCERT Class 9 Science Chapter 3, students will learn the laws of chemical combination , atoms and molecules. They will get to know how to write a chemical formula, molecular mass and mole concepts and some numerical problems related to these concepts.

Topics Covered in Class 9 Science Chapter 3 Atoms and Molecules  :

Particle nature and their basic units: Atoms and molecules, Law of Chemical Combination, Chemical formula of common compounds, Atomic and molecular masses.

Also, access the following resources for Class 9 Chapter 3 Atoms and Molecules, at BYJU’S:

• Atoms And Molecules Class 9 Notes – Chapter 3
• Important Questions for Class 9 Science Chapter 3 – Atoms and Molecules
• NCERT Exemplar Class 9 Science Solutions for Chapter 3 – Atoms And Molecules

Chapter 4: Structure of the Atom

This chapter of NCERT Class 9 Science deals with the various atomic models of atoms that were proposed by different scientists. In addition to it, this chapter also covers electrons’ distribution in different orbits, calculation of valency , atomic number and mass number.

Topics Covered in Class 9 Science Chapter 4 Structure of the Atom  :

Structure of atoms: Electrons, protons and neutrons, Valency, Atomic Number and Mass Number, Isotopes and Isobars.

Also, access the following resources for Class 9 Chapter 4 Structure of the Atom at BYJU’S:

• Structure of the Atom Class 9 CBSE Notes – Chapter 4
• Important Questions of CBSE Class 9 Science Chapter 4 – Structure of the Atom
• NCERT Exemplar Class 9 Science Solutions for Chapter 4 – Structure of the Atom

Chapter 5: The Fundamental Unit of Life

This chapter is related to Biology. In this chapter, students will get to know that the cell is the fundamental unit of life. The whole chapter revolves around the cell and its structural organisation, in which students will learn about the plasma membrane , cell wall, nucleus, cytoplasm and structure of an animal cell.

Topics Covered in Class 9 Science Chapter 5 The Fundamental Unit of Life  :

Cell – Basic Unit of life: Cell as a basic unit of life; prokaryotic and eukaryotic cells, multicellular organisms; cell membrane and cell wall, cell organelles and cell inclusions; chloroplast, mitochondria, vacuoles, endoplasmic reticulum, Golgi apparatus; nucleus, chromosomes – basic structure, number.

Also, access the following resources for Class 9 Chapter 5 The Fundamental Unit of Life at BYJU’S:

• The Fundamental Unit of Life Class 9 CBSE Notes – Chapter 5
• Revision Notes For Class 9 Science Chapter 5 The Fundamental Unit of Life
• NCERT Exemplar Class 9 Science Solutions for Chapter 5 – The Fundamental Unit of Life

Chapter 6: Tissues

This chapter pertains to the basic definition of tissue and then elaborates on Plant and Animal tissue with proper diagrams. Students will get to know the different types of plant and animal tissues with a detailed explanation of each.

Topics Covered in Class 9 Science Chapter 6 Tissues  :

Tissues, Organs, Organ System, Organism: Structure and functions of animal and plant tissues (only four types of tissues in animals; Meristematic and Permanent tissues in plants).

Also, access the following resources for Class 9 Chapter 6 Tissues at BYJU’S:

• Tissues Class 9 CBSE Notes – Chapter 6
• Revision Notes For Class 9 Science Chapter 6 Tissues
• NCERT Exemplar Class 9 Science Solutions for Chapter 6 – Tissues

Chapter 7: Diversity in Living Organism

This chapter deals with the classification of plants and animals. Students get to know that all living organisms are divided into 5 kingdoms namely Monera, Protista, Fungi, Plantae and Animalia. It also describes the classification and evolution, the hierarchy of classification.

Also access the following resources for Class 9 Chapter 7 Diversity in Living Organism at BYJU’S:

• Diversity in Living Organisms Class 9 CBSE Notes – Chapter 7
• Important Questions for CBSE Class 9 Science Chapter 7 – Diversity in Living Organisms
• NCERT Exemplar Class 9 Science Solutions for Chapter 7 – Diversity In Living Organisms

Chapter 8: Motion

NCERT Class 9 Science Chapter 8 describes motion, the speed with direction, rate of change of velocity , and graphical representation of motion. Also, students will find the 3 equations of motion and numerical problems related to them. Overall, this chapter will be a mix of theory as well as the numerical part.

Topics Covered in Class 9 Science Chapter 8 Motion :

Motion: Distance and displacement, velocity; uniform and non-uniform motion along a straight line; acceleration, distance-time and velocity-time graphs for uniform motion and uniformly accelerated motion, elementary idea of uniform circular motion.

Also, access the following resources for Class 9 Chapter 8 Motion at BYJU’S:

• CBSE Class 9 Physics Motion Notes
• NCERT Exemplar Class 9 Science Solutions for Chapter 8 – Motion

Chapter 9: Force and Law of Motion

This chapter explains the 3 laws of motion with the help of diagrams and examples. Below are the 3 laws of motion:

• First law of motion: An object continues to be in a state of rest or of uniform motion along a straight line unless acted upon by an unbalanced force.
• Second law of motion: The rate of change of momentum of an object is proportional to the applied unbalanced force in the direction of the force .
• Third law of motion: To every action, there is an equal and opposite reaction, and they act on two different bodies.

Topics Covered in Class 9 Science Chapter 9 Force and Law of Motion  :

Force and Newton’s laws: Force and Motion, Newton’s Laws of Motion, Action and Reaction forces, Inertia of a body, Inertia and mass, Momentum, Force and Acceleration.

Also, access the following resources for Class 9 Chapter 9 Force and Law of Motion at BYJU’S:

• Force and Laws Of Motion Class 9 CBSE Notes – Chapter 9
• Revision Notes For Class 9 Science Chapter 9 Force and Laws of Motion
• NCERT Exemplar Class 9 Science Solutions for Chapter 9 – Force and Laws Of Motion

Chapter 10: Gravitation

In chapter 10 of NCERT Class 9 Science, students will learn the universal law of gravitation and its importance, free fall, mass, weight, thrust and pressure, Archimedes’ principle and relative density. Students will also find numerical problems related to these topics.

Topics Covered in Class 9 Science Chapter 10 Gravitation :

Gravitation: Gravitation; Universal Law of Gravitation, Force of Gravitation of the earth (gravity), Acceleration due to Gravity; Mass and Weight; Free fall.

Floatation: Thrust and Pressure. Archimedes’ Principle; Buoyancy.

Also, access the following resources for Class 9 Chapter 10 Gravitation at BYJU’S:

• Gravitation Class 9 CBSE Notes – Chapter 10
• Revision Notes For Class 9 Science Chapter 10 Gravitation
• NCERT Exemplar Class 9 Science Solutions for Chapter 10 – Gravitation

Chapter 11: Work and Energy

In this chapter, the concept of work is defined with different activities, numerical and examples. The chapter also deals with energy and its different forms. Examples are given to explain all types of energy. The chapter ends with the topic “rate of doing work”.

Topics Covered in Class 9 Science Chapter 11 Work and Energy  :

Work, Energy and Power: Work done by a Force, Energy, power; Kinetic and Potential energy; Law of conservation of energy (excluding commercial unit of Energy).

Also, access the following resources for Class 9 Chapter 11 Work and Energy at BYJU’S:

• Work And Energy Class 9 CBSE Notes – Chapter 11
• Revision Notes For Class 9 Science Chapter 11 Work and Energy
• NCERT Exemplar Class 9 Science Solutions for Chapter 11 – Work And Energy

Chapter 12: Sound

Chapter 12 of CBSE Class 9 Science, deals with concepts such as the production of sound, propagation of sound, the reflection of sound, range of hearing, applications of ultrasound, and the structure of the human ear . A few numericals are also there in the chapter which can only be solved after understanding the concepts. So, students must grasp and study the chapter carefully.

Topics Covered in Class 9 Science Chapter 12 Sound :

Sound: Nature of sound and its propagation in various media, speed of sound, range of hearing in humans; ultrasound; reflection of sound; echo.

Also access the following resources for Class 9 Chapter 12 Sound at BYJU’S:

• CBSE Class 9 Science Chapter 12 Sound Notes
• Important Questions for CBSE Class 9 Science Chapter 12 – Sound
• NCERT Exemplar Class 9 Science Solutions for Chapter 12 – Sound

Chapter 13: Why Do We Fall Ill?

NCERT Class 9 Science chapter 13 deals with health issues and different types of diseases. It covers topics like; Health and its failure , disease and its cause, infectious diseases. This chapter is added to make students aware of different types of diseases so that they take care of their health and be fit and healthy.

Also access the following resources for Class 9 Chapter 13 Why Do We Fall Ill? at BYJU’S:

• Why Do We Fall Ill? Class 9 CBSE Notes – Chapter 13
• Important Questions for CBSE Class 9 Science Chapter 13 – Why Do We Fall Ill?
• NCERT Exemplar Class 9 Science Solutions for Chapter 13 – Why Do We Fall Ill?

Chapter 14: Natural Resources

We are blessed with natural resources. These are essential to meet the basic requirements of all forms of life on Earth. So, this chapter has been included by NCERT to provide knowledge on the types of resources available on the Earth. This chapter deals with the topics like air, water, soil, the biogeochemical cycle and the ozone layer, its importance and how humans are polluting them.

Also access the following resources for Class 9 Chapter 14 Natural Resources at BYJU’S:

• Natural Resources Class 9 CBSE Notes – Chapter 14
• Revision Notes For Class 9 Science Chapter 14 Natural Resources
• NCERT Exemplar Class 9 Science Solutions for Chapter 14 – Natural Resources

Chapter 15: Improvement in Food Resources

The last chapter of NCERT Class 9 Science covers topics like Improvement in crop yields, manure, fertilizer, storage of grains, and animal husbandry . This chapter provides knowledge regarding agriculture, farming and dairy.

Also access the following resources for Class 9 Chapter 15 Improvement in Food Resources at BYJU’S:

• Improvement in Food Resources Class 9 CBSE Notes – Chapter 15
• Important Questions for CBSE Class 9 Science Chapter 15 – Improvement in Food Resources
• Revision Notes For Class 9 Science Chapter 15 Improvement in Food Resources
• NCERT Exemplar Class 9 Science Solutions for Chapter 15 – Improvement In Food Resources

To download the complete book in PDF format, visit NCERT Science Book Class 9 . For more practice tests and mock tests, sign up on BYJU’S the learning app. Apart from Science, get NCERT Solutions for all the subjects. Students can download worksheets, assignments, NCERT Books , notes and study materials for exam preparation and for a better understanding of the topics.

CBSE Class 9 Science Evaluation Scheme (Theory) –

Features of ncert 9 th class science book solutions.

The book has a wide variety of features which are listed below:

• CBSE Class 9 Science NCERT Solutions are available to everyone for free.
• Covers all the exercise problems from the Class 9 textbook.
• Consists of extra questions, exemplar problems, the important questions from previous year question papers and sample papers, worksheets, MCQs, short answering questions, descriptive type questions, their solutions and tips and tricks.
• CBSE Class 9 Science Solutions files are available for download in PDF format for easy access.
• Diagrams are included to help students visualize the topics.
• Most effective solutions are given which can help to score well in the exams.

Frequently Asked Questions on NCERT Solutions for Class 9 Science

How many chapters are there in the ncert solutions for class 9 science , can i expect the questions from ncert solutions for class 9 science to be asked in the annual exam, is the ncert solutions for class 9 science sufficient for the exam preparation, why should students refer to the ncert solutions for class 9 science , leave a comment cancel reply.

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