The Wonderful World of Science — Class 6 Science NCERT Solutions (Free)
Free step-by-step NCERT solutions for Class 6 Science chapter "The Wonderful World of Science" — 8 important questions with detailed answers for CBSE board exam preparation.
TL;DR: Free step-by-step NCERT solutions for Class 6 Science chapter "The Wonderful World of Science" — 8 important questions with detailed answers for CBSE…
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NCERT Solutions for Class 6 Science — The Wonderful World of Science. Step-by-step answers to all 8 textbook questions from this chapter, written for CBSE board preparation and free to use.
The Wonderful World of Science — All 8 Questions Solved
Q1. What is science?
Science is a systematic study of nature and natural phenomena using observations, experiments, and logical reasoning to understand how the world works.
Q2. Name the main branches of science.
The main branches are:
- Physics (study of matter, energy, and motion)
- Chemistry (study of substances and their reactions)
- Biology (study of living organisms)
Q3. What is the scientific method?
The scientific method is a step-by-step process:
- Observation (noticing something)
- Question (asking why or how)
- Hypothesis (making a prediction)
- Experiment (testing the prediction)
- Conclusion (analyzing results)
Q4. Define observation.
Observation is the act of carefully watching or noticing something using our senses or instruments to gather information.
Q5. What is a hypothesis?
A hypothesis is an educated guess or tentative explanation based on limited evidence that can be tested through experimentation.
Q6. Why is experimentation important in science?
Experimentation is important because it helps us test hypotheses, verify predictions, and gather reliable data to understand natural phenomena accurately.
Q7. What does 'systematic' mean in the context of science?
Systematic means following a planned, orderly, and logical approach with consistent methods and careful recording of observations and results.
Q8. How does science help us in daily life?
Science helps us understand how things work, improves technology, medicine, agriculture, and makes our daily life easier, safer, and more comfortable.
The Wonderful World of Science — Practice MCQs with Answers
Attempt these 20 multiple-choice questions after working through the solutions above. Each carries the correct option and the reasoning behind it, so a wrong answer tells you which idea to revisit.
MCQ 1. What is the main purpose of science?
- A. To tell fictional stories
- B. To understand the natural world
- C. To play games
- D. To make money
Answer: B. To understand the natural world — Science primarily aims to explore, observe, and understand how the natural world works through systematic investigation and experimentation.
MCQ 2. Which of these is a branch of science that specifically studies living organisms?
- A. Physics
- B. Chemistry
- C. Biology
- D. Geology
Answer: C. Biology — Biology is the scientific study of life, focusing on living organisms, their structure, function, growth, origin, evolution, and distribution.
MCQ 3. What tool would a scientist use to observe very tiny objects like cells or bacteria?
- A. Telescope
- B. Microscope
- C. Binoculars
- D. Spectacles
Answer: B. Microscope — A microscope is an optical instrument designed to magnify small objects, making it possible to see things invisible to the naked eye.
MCQ 4. Who is widely known for discovering the law of universal gravitation after observing a falling apple?
- A. Albert Einstein
- B. Isaac Newton
- C. Galileo Galilei
- D. Marie Curie
Answer: B. Isaac Newton — Sir Isaac Newton formulated the law of universal gravitation, a fundamental law describing the gravitational attraction between all objects with mass.
MCQ 5. Which step typically comes first in a scientific investigation?
- A. Forming a hypothesis
- B. Conducting an experiment
- C. Making an observation
- D. Drawing a conclusion
Answer: C. Making an observation — The scientific method usually begins with making an observation about something intriguing or unexplained, which then leads to questions.
MCQ 6. What is a 'hypothesis' in the context of science?
- A. A proven fact
- B. A random guess
- C. An educated guess that can be tested
- D. A final conclusion
Answer: C. An educated guess that can be tested — A hypothesis is a proposed explanation for a phenomenon, which is based on prior observations and can be tested through experimentation.
MCQ 7. Why is it important for scientific experiments to be repeatable by other scientists?
- A. To make the experiment longer
- B. To ensure the results are reliable and not just a fluke
- C. To find new uses for the equipment
- D. To prove the first scientist was wrong
Answer: B. To ensure the results are reliable and not just a fluke — Repeatability ensures that the experimental results are consistent and reliable across different conditions and researchers, validating the findings.
MCQ 8. Which of the following is NOT an example of how science benefits our daily life?
- A. Developing new medicines
- B. Improving communication technology
- C. Creating fictional stories
- D. Understanding weather patterns
Answer: C. Creating fictional stories — While science can inspire fictional stories, its direct benefit lies in practical applications like health, technology, and understanding natural phenomena, not in creating fiction itself.
MCQ 9. What is the name of the scientific instrument used to view distant objects like stars and planets?
- A. Kaleidoscope
- B. Periscope
- C. Telescope
- D. Endoscope
Answer: C. Telescope — A telescope is an optical instrument used to observe distant objects by collecting and focusing electromagnetic radiation.
MCQ 10. What is the main difference between a scientific theory and a scientific law?
- A. A law is a guess, a theory is proven.
- B. A theory explains 'why' something happens, a law describes 'what' happens.
- C. A law is always wrong, a theory is always right.
- D. There is no difference, they are the same.
Answer: B. A theory explains 'why' something happens, a law describes 'what' happens. — A scientific law describes an observed phenomenon, often mathematically, while a scientific theory provides a well-substantiated explanation for that phenomenon.
MCQ 11. Dr. C.V. Raman, an Indian physicist, won the Nobel Prize for his work on the scattering of light. What is this phenomenon famously known as?
- A. Newton's Law
- B. Einstein's Relativity
- C. The Raman Effect
- D. Boyle's Law
Answer: C. The Raman Effect — Dr. C.V. Raman discovered that when light passes through a transparent material, some of the deflected light changes wavelength, a phenomenon called the Raman Effect.
MCQ 12. What kind of thinking encourages asking questions, seeking evidence, and avoiding superstitions?
- A. Magical thinking
- B. Wishful thinking
- C. Scientific thinking
- D. Emotional thinking
Answer: C. Scientific thinking — Scientific thinking emphasizes critical analysis, logical reasoning, and relying on empirical evidence rather than unsubstantiated beliefs or superstitions.
MCQ 13. If an experiment yields results that contradict the initial hypothesis, what should a scientist typically do?
- A. Ignore the results and declare the hypothesis correct
- B. Change the results to match the hypothesis
- C. Re-evaluate the hypothesis and conduct more experiments or modify the existing ones
- D. Stop the investigation entirely
Answer: C. Re-evaluate the hypothesis and conduct more experiments or modify the existing ones — Contradictory results are crucial in science; they prompt scientists to revise their hypothesis, design new experiments, or re-examine their methods to understand the discrepancies.
MCQ 14. Which of the following best describes the process of 'inference' in science?
- A. Directly observing a fact
- B. Making a prediction about the future
- C. Forming a conclusion based on observations and prior knowledge
- D. Guessing without any information
Answer: C. Forming a conclusion based on observations and prior knowledge — An inference is a logical conclusion or interpretation drawn from observations and existing knowledge, rather than a direct observation itself.
MCQ 15. Which of these qualities is most crucial for a scientist when exploring new ideas or phenomena?
- A. A large bank account
- B. A strong sense of humor
- C. Curiosity and an open mind
- D. A very strict daily schedule
Answer: C. Curiosity and an open mind — Curiosity drives the desire to explore and understand the unknown, while an open mind allows scientists to consider new possibilities and adapt to evidence.
MCQ 16. What is the primary goal of science?
- A. To win arguments
- B. To understand the natural world
- C. To make people rich
- D. To tell stories
Answer: B. To understand the natural world — Science aims to systematically observe, experiment, and explain the phenomena of the natural and physical world.
MCQ 17. Which branch of science deals with the study of living organisms?
- A. Physics
- B. Chemistry
- C. Biology
- D. Geology
Answer: C. Biology — Biology is the natural science that studies life and living organisms, including their structure, function, growth, evolution, distribution, and taxonomy.
MCQ 18. What is the first step in the scientific method?
- A. Forming a hypothesis
- B. Conducting an experiment
- C. Making an observation
- D. Drawing a conclusion
Answer: C. Making an observation — The scientific method begins with observing a phenomenon or asking a question about the natural world.
MCQ 19. Which of these is a tool used by scientists to see very tiny objects?
- A. Telescope
- B. Microscope
- C. Binoculars
- D. Ruler
Answer: B. Microscope — A microscope is an optical instrument used to observe objects that are too small to be seen normally with the naked eye.
MCQ 20. What is the main characteristic that distinguishes living things from non-living things?
- A. Being hard
- B. Being able to move
- C. Being able to grow
- D. Being able to reflect light
Answer: C. Being able to grow — Living things exhibit growth, reproduction, response to stimuli, and cellular organization, which non-living things generally do not.
How to Use These Solutions
Attempt each question yourself first and only then compare with the worked answer. Marks in the CBSE board exam are awarded for the METHOD as much as the final result, so reproduce the steps rather than memorising the last line. Where a solution states a law, a formula or a definition, learn that wording — examiners look for it.
Related practice for this chapter: chapter MCQs, previous-year questions, revision notes and sample papers.