12 Sections
92 Lessons
Lifetime

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Chapter 1: The Ever-Evolving World of Science
This chapter introduces students to the nature and scope of science, showing how it influences our everyday lives. It encourages curiosity and builds a basic understanding of scientific inquiry.
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Chapter 2: Exploring Substances: Acidic, Basic, and Neutral
Students learn about different types of substances—acids, bases, and neutrals—and how to identify them using indicators. The concept of neutralization is explained through real-life applications.
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Chapter 3: Electricity: Circuits and Their Components
This chapter explains how electric circuits work and introduces basic electrical components and their symbols. It also discusses conductors and insulators through engaging hands-on activities.
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Chapter 4: The World of Metals and Non-metals
Learners explore the properties of metals and non-metals, how they react with the environment, and the effects of corrosion. It helps them distinguish between different materials based on their characteristics.
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Chapter 5: Changes Around Us: Physical and Chemical
The focus is on understanding different types of changes, including physical and chemical transformations. Real-life examples help explain how such changes occur in daily life and nature.
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Chapter 6: Adolescence: A Stage of Growth and Change
This chapter discusses the physical and emotional changes during adolescence, including puberty and menstruation. It also promotes awareness of myths and emphasizes healthy growth.
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Chapter 7: Heat Transfer in Nature
Students are introduced to the methods of heat transfer—conduction, convection, and radiation. The chapter links these processes to natural phenomena like the water cycle and groundwater seepage. These CBSE Class 7 Science – Chapter Wise Study Materials Based on NCERT explain Heat Transfer in Nature through conduction, convection, and radiation. Students learn how these processes relate to natural phenomena such as the water cycle and groundwater movement. All study materials are prepared strictly as per the NCERT syllabus, making them ideal for CBSE Class 7 exam preparation.
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Chapter 8: Measurement of Time and Motion
Basic concepts of motion and time measurement are covered. Students understand how to calculate speed and relate it to time, laying the groundwork for physics in higher classes. This CBSE Class 7 Science – Chapter Wise Study Materials Based on NCERT post explains the fundamentals of measurement of time and motion. Students learn how speed, distance, and time are related, helping them build strong conceptual grounding for higher-level physics. These study materials follow the NCERT syllabus strictly, making them ideal for CBSE Class 7 board-exam preparation.
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Chapter 9: Life Processes in Animals
The chapter focuses on nutrition and digestion in humans and animals. It also introduces respiration and the mechanism of breathing, emphasizing their importance in sustaining life.
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Chapter 10: Life Processes in Plants
Students learn how plants grow, prepare food via photosynthesis, and transport nutrients and water. The chapter highlights key life functions in plants like respiration and nutrient movement.
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Chapter 11: Light: Shadows and Reflections
The behavior of light and its interaction with objects is explored through shadows, reflections, and optical devices like mirrors and periscopes. The chapter encourages observation-based learning. This CBSE Class 7 Science – Chapter 11: Light: Shadows and Reflections study material provides clear, NCERT-aligned explanations of how light behaves, how shadows form, and how reflections occur in mirrors and simple optical devices. Designed strictly as per the NCERT syllabus, these resources ensure strong concept clarity and are ideal for CBSE Class 7 Board exam preparation.
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Chapter 12: Earth, Moon, and the Sun
This chapter explains the movements of the Earth and their effects, such as day - night and seasons. It also introduces celestial phenomena like solar and lunar eclipses.
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The Ever-Evolving World of Science – MCQs Online Practice Test with Automatic scoring

CBSE Class 7 Science – Chapter 1: The Ever-Evolving World of Science – Online MCQ Quiz

CBSE Class 7 Science – Chapter Wise Study Materials (NCERT Based)

Class: 7

Subject: Science

Chapter: 1 – The Ever-Evolving World of Science

CBSE Board Examinations – Systematic Online Practice

This 30-question, 30-minute online MCQ quiz is strictly based on the NCERT syllabus for Class 7 Science and is ideal for:

CBSE Class 7 Annual / Term-End Examinations
Class Tests, Periodic Tests and Internal Assessments
Olympiads and Science Talent Exams (Class 7 level)
Concept-building foundation for higher classes (Class 8–10)

Chapter 1 – "The Ever-Evolving World of Science" introduces the nature and scope of science, shows its role in everyday life and develops a basic understanding of scientific inquiry.

This quiz contains 30 topic-wise MCQs with automatic scoring and instant concept-clearing feedback for every question.

Instructions: You have 30 minutes to answer all 30 questions. Click Start Quiz to begin the timer. Select only one correct option for each question. Feedback and explanation will appear immediately after each selection. When the timer ends, the quiz is auto-submitted.

Topic 1: Nature and Scope of Science

Q1. The "scope of science" mainly refers to:

A. Only what happens inside laboratories B. All areas where scientific ideas are applied C. Only space research and astronomy D. Only inventions of big machines

The scope of science is very wide. It includes everything from health, transport, farming, communication to space research. It is not limited to laboratories or a single field.

Q2. Which option best describes science?

A. A collection of fixed beliefs B. Only memorising difficult facts C. A way of asking questions and finding answers logically D. Only doing calculations in mathematics

Science is a method of inquiry. We observe, ask questions, make hypotheses, perform experiments and then draw conclusions. It is much more than just memorising facts.

Q3. Which statement about science is correct?

A. Science never changes with time. B. Science is only useful for scientists. C. Science is based only on guesses. D. Science grows when new evidence and ideas are found.

Scientific knowledge keeps improving as new evidence is collected and better tools are invented. Old ideas may be corrected or replaced, so science is dynamic and ever-evolving.

Q4. Which daily activity clearly shows science in action?

A. Believing that an eclipse brings bad luck B. Using a pressure cooker to cook food faster C. Ignoring traffic lights D. Sharing untested health messages

A pressure cooker uses scientific ideas of pressure and boiling point to cook food faster. This is a direct example of how science makes our daily life easier and more efficient.

Q5. The main aim of learning science at school is to:

A. Develop curiosity, reasoning and problem-solving skills B. Only score marks in exams C. Avoid asking questions D. Memorise definitions without understanding

Science education should help students think logically, ask questions and solve problems. Marks are important, but real learning comes from understanding and applying concepts.

Topic 2: Scientific Inquiry – Observation, Hypothesis, Experimentation

Q6. Scientific inquiry usually begins with:

A. Writing a long report B. Directly making a final law C. Careful observation and asking a question D. Copying other scientists’ results

Every scientific investigation starts when we notice something interesting, observe it carefully and ask a clear question about it. This question guides the whole inquiry.

Q7. A "hypothesis" is best defined as:

A. A law that can never change B. A testable idea or possible explanation C. A random guess that is not tested D. A superstition followed by people

A hypothesis is a thoughtful, testable idea. It explains what you think might be true, and then experiments are done to check if it is correct or not.

Q8. In a fair test, students should:

A. Change as many factors as possible B. Never record their results C. Ignore unusual observations D. Keep all conditions same except the one being tested

In a fair test or controlled experiment, only one factor (variable) is changed. All other conditions are kept the same so we can be sure which factor caused the result.

Q9. Good observation skill in science means:

A. Noticing and recording small details carefully B. Guessing without looking at things C. Copying friends’ observations D. Ignoring any change that happens

Scientists carefully note details such as colour, size, time and changes. Accurate observations form the base of correct conclusions in science.

Q10. A scientific conclusion should be based on:

A. Personal liking B. Rumours heard from others C. Evidence and results from experiments D. What most people believe

In science, conclusions must come from data and evidence collected during experiments, not from opinions or popularity of an idea.

Topic 3: Science in Our Daily Life

Q11. Which activity uses science and technology directly?

A. Sitting idle all day B. Using a smartphone to video-call a friend C. Believing every rumour D. Ignoring weather forecasts

Smartphones, internet and video calling systems are the results of scientific and technological development in electronics, communication and computing.

Q12. Using LPG instead of firewood in the kitchen helps because it:

A. Produces more smoke B. Stops heat production C. Cooks faster and produces less smoke D. Always wastes fuel

LPG burns with a clean, hot flame that cooks food quickly and produces very little smoke compared to firewood. This improves health and saves time.

Q13. A refrigerator helps in food preservation mainly by:

A. Heating the food B. Removing all nutrients C. Allowing germs to grow faster D. Keeping food at low temperature to slow germ growth

At low temperatures, the activity of many microorganisms decreases. This slows down food spoilage, so food can be safely stored for a longer time.

Q14. Brushing teeth with fluoride toothpaste is related to science because:

A. Fluoride helps protect teeth from decay B. It is colourful C. It always changes tooth colour D. It works only in winter

Scientific studies show that fluoride strengthens tooth enamel and reduces tooth decay. This is an example of chemistry and health science helping us in daily life.

Q15. Which device uses electricity and magnetism together to work?

A. Wooden chair B. Electric fan C. Clay pot D. Paper bag

An electric fan has a motor inside it. The motor runs using electrical energy and magnetic fields, showing how physics is applied to make our lives comfortable.

Topic 4: Science, Society and Environment

Q16. Using solar panels in villages is encouraged because solar energy:

A. Produces a lot of smoke B. Is a non-renewable resource C. Is clean and renewable D. Always increases electricity bills

Solar energy comes from the Sun. It does not produce smoke or harmful gases and can be used again and again. This makes it an eco-friendly energy source.

Q17. Plastic causes environmental problems mainly because it:

A. Decomposes very quickly B. Does not decompose easily C. Always turns into fertiliser D. Is eaten safely by all animals

Most plastics are non-biodegradable. They remain in soil and water for many years and can harm animals, plants and the environment.

Q18. Planting more trees is supported by science because trees:

A. Absorb carbon dioxide and release oxygen B. Only add dust to air C. Reduce rainfall everywhere D. Make soil useless

Through photosynthesis, trees take in carbon dioxide and give out oxygen. They also prevent soil erosion and support biodiversity, improving environmental health.

Topic 5: Safety and Ethics in Science

Q19. Which is a correct lab safety rule?

A. Running and pushing others in the lab B. Tasting chemicals to know them C. Pointing test tubes at friends D. Wearing safety goggles during experiments

Safety goggles protect eyes from harmful splashes or particles. Following safety rules prevents accidents and makes practical work safe for everyone.

Q20. Ethics in science mainly means:

A. Hiding wrong results B. Being honest and working for the good of people C. Copying others’ work D. Misusing scientific knowledge

Ethical scientists are truthful about their data, do not cheat and use their knowledge to help society, not to harm people or the environment.

Q21. Why should we never taste chemicals in a science lab?

A. They are always too sweet B. They have no effect at all C. Many chemicals can be poisonous and harmful D. They are meant to be eaten

Even a small amount of some chemicals can damage body organs. Therefore, tasting or directly smelling chemicals is strictly forbidden in safe scientific practice.

Topic 6: Careers and Contributions in Science

Q22. Which career is directly based on medical science?

A. Doctor B. Singer C. Painter D. Dancer

Doctors study biology and medical science to understand the human body and to diagnose and treat diseases. Their work is a direct application of science to society.

Q23. A meteorologist mainly studies:

A. Ancient fossils B. Deep sea animals C. Only stars and galaxies D. Weather and atmosphere

Meteorologists use instruments and satellites to study the atmosphere and predict weather events such as rain, storms and cyclones, which is very useful for people.

Q24. Stories of scientists like C. V. Raman and A. P. J. Abdul Kalam help students to:

A. Stop studying science B. Get inspired and learn good scientific values C. Believe in superstitions D. Avoid hard work

Such stories show how scientists worked hard, stayed honest and used science to serve the nation, encouraging students to develop similar qualities.

Topic 7: Scientific Attitude and Logical Thinking

Q25. A scientific attitude mainly includes:

A. Accepting everything without proof B. Believing only rumours C. Being curious and seeking evidence D. Ignoring facts and data

Scientific attitude means asking questions, collecting evidence and accepting ideas only when there is reliable proof, not just because others say so.

Q26. Superstition can be defined as:

A. A belief followed without scientific evidence B. A fact proved by many experiments C. A law of motion D. A theory supported by data

Superstitions are beliefs accepted blindly, without proof. Science tries to replace superstitions with logical, evidence-based explanations.

Topic 8: Science and Technology – Benefits and Limitations

Q27. Which of these is a major benefit of modern communication technology?

A. Complete isolation of people B. Stopping all learning C. Slowing down information sharing D. Instant communication across the world

Phones, internet and satellites allow people to share information and talk in real time across long distances, which is a big achievement of science and technology.

Q28. Excessive use of screens (mobiles, tablets) can lead to:

A. Always better eyesight B. Eye strain and reduced physical activity C. Stronger bones automatically D. Guaranteed better sleep

Spending long hours on screens can tire the eyes, cause headaches and leave less time for games, exercise and outdoor activities, so balance is necessary.

Topic 9: Ever-Evolving Nature of Scientific Knowledge

Q29. Scientific ideas change over time mainly because:

A. Scientists get bored of old ideas B. Students want new textbooks C. New evidence and better instruments are discovered D. Science is based only on opinions

When scientists collect new data or use more advanced instruments, they may find that old ideas need improvement. This constant updating makes science ever-evolving.

Topic 10: Role of Science in Shaping the Future

Q30. Why should Class 7 students develop interest in science for the future?

A. To avoid thinking deeply B. Only to memorise facts C. To increase fear about problems D. To understand the world and become problem-solvers

Future citizens with strong scientific understanding can design new solutions for issues like clean water, energy, health and environment, making the world a better place.

The Ever-Evolving World of Science – MCQs with Answers and Explanations

The Ever-Evolving World of Science – Numerical Problems with Stepwise Solutions

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The Ever-Evolving World of Science – MCQs Online Practice Test with Automatic scoring

CBSE Board Examinations – Systematic Online Practice

Topic 1: Nature and Scope of Science

Topic 2: Scientific Inquiry – Observation, Hypothesis, Experimentation

Topic 3: Science in Our Daily Life

Topic 4: Science, Society and Environment

Topic 5: Safety and Ethics in Science

Topic 6: Careers and Contributions in Science

Topic 7: Scientific Attitude and Logical Thinking

Topic 8: Science and Technology – Benefits and Limitations

Topic 9: Ever-Evolving Nature of Scientific Knowledge

Topic 10: Role of Science in Shaping the Future

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