Mastery

Exploring the Investigative World of Science — Mastery

30 questions 30 min Full-chapter mastery

Q1. The third 'Probe and ponder' question of Class 8 Curiosity invites students to wonder why nature has created
- A. Only one shape of leaf and one type of insect
- B. Such a vast variety of plants and animals — different shapes of leaves, many kinds of insects
- C. More animals than plants
- D. Animals that look exactly like humans
Q2. After the three Probe-and-ponder questions, the chapter asks each student to
- A. Copy the questions in their notebook
- B. Translate the questions into English
- C. Write here a question that makes them curious about the world
- D. Underline difficult words
Q3. Resses its readers as
- A. 'Dear Young Scientists'
- B. 'Dear Students'
- C. 'Dear Children'
- D. 'Dear Examinees'
Q4. The chapter hopes Class 8 students will bring along which 'spirit' that has guided their science journey so far?
- A. Of fear and obedience
- B. Of speed and competition
- C. Of silence and reading alone
- D. Of adventure and exploration
Q5. Beyond observing and experimenting, the chapter says investigators should also
- A. Hide their results
- B. Argue without evidence
- C. Avoid telling anyone what they found
- D. Explain clearly what they see
Q6. What does the chapter say about the patterns in the lines at the bottom of the page?
- A. They are random ink-marks with no meaning
- B. They show student names
- C. They contain some hidden scientific thoughts, mainly to make the page a little less boring
- D. They are puzzles a student must solve to pass the chapter
Q7. Which two helpful roles of microbes does the chapter name?
- A. They make plants tall and animals strong
- B. They generate electricity and shine light
- C. They cool the air and warm the soil
- D. They help digest our food and produce medicines
Q8. The chapter says heating effect and magnetic effect of electric current are 'phenomena' that depend on
- A. The teacher's instructions
- B. Fundamental forces
- C. The classroom temperature
- D. The shape of the wire
Q9. Priya feels a gentle breeze in her courtyard. According to the chapter, this is a result of
- A. A small difference in air pressure
- B. Strong magnetic forces
- C. Solar reflection
- D. A small change in particle size
Q10. A car stops when the brakes are applied. The chapter uses this as an example to motivate the study of
- A. Microbes
- B. Mirrors and lenses
- C. Ecosystems
- D. Forces acting on objects
Q11. The chapter introduces 'pressure' as the idea of
- A. How the colour of an object changes with temperature
- B. How an object is reflected in a spoon
- C. How a magnet attracts iron
- D. How force is distributed over an object
Q12. Why does the chapter say we need to 'zoom into' materials to understand how air can exert pressure or why water boils at a certain temperature?
- A. Because in gases, particles can move around freely; we have to see what particles a material is made of and how they move
- B. Because we need to count the colours of the material
- C. Because particles glow when zoomed in
- D. Because the material disappears at high temperature
Q13. A Class 8 teacher asks students to group cards labelled 'iron', 'water', 'air', 'sugar-tea solution', 'common salt' into elements, compounds and mixtures. According to the chapter, this kind of grouping shows that
- A. Classifying things around us is an important feature of science
- B. Classification has nothing to do with science
- C. Only chemists are allowed to classify
- D. Classification is part of language, not science
Q14. Many people use 'corrective glasses' to see clearly. According to the chapter, this is best explained by the
- A. Heating effect of light
- B. Magnetic property of glass
- C. Bending (refraction) of light when it passes through lenses
- D. Reflection of light from rough surfaces
Q15. The chapter says that, besides polished mirrors, light is also reflected by
- A. Rough surfaces and the Moon
- B. Black holes only
- C. Glass that has no coating
- D. Nothing else
Q16. The chapter previews that we will study how light rays reflect off
- A. Only flat mirrors
- B. Only curved mirrors
- C. Neither flat nor curved mirrors
- D. Both flat and curved mirrors
Q17. Two roles of Earth's atmosphere named in the chapter are
- A. It magnetises iron and electrifies water
- B. It cooks food and stores cold
- C. It dyes the sky red and warms the seas
- D. It provides the oxygen we breathe and shields us from harmful ultraviolet rays
Q18. Every living being — from the tiniest insect to the largest whale, from blades of grass to tall trees — depends on and responds to
- A. Only the temperature inside their nest or burrow
- B. Only sunlight
- C. Only soil chemistry
- D. Air, water, sunlight and other organisms around them
Q19. Which of these best captures the chapter's view on humans and climate change?
- A. Humans are only the problem; nature alone can solve climate change
- B. Humans are only victims; climate change has no human cause
- C. The problem is unsolvable; nothing can be done
- D. Humans are at the heart of both the problem and any possible solution — we are the ones who can and must use science to guide our actions
Q20. The chapter says the starting move of an investigation is to combine curiosity, careful observation and asking the question
- A. Who said this?
- B. How do I score full marks?
- C. When does the bell ring?
- D. What happens if…?
Q21. In the puri investigation, the chapter says one thing students 'can perhaps think of changing' is
- A. The colour of the rolling pin
- B. The brand of the gas stove
- C. The day of the week
- D. The thickness and the size of the rolled dough
Q22. The chapter mentions three different ways to drop the rolled dough into hot oil while frying. They are
- A. Drop with eyes closed, with eyes open, in dim light
- B. Drop in the morning, afternoon, evening
- C. Drop with the left hand, right hand, both hands
- D. Drop it vertically, slide it at an angle, slide it slowly
Q23. Aanya argues that her home kitchen 'doesn't count' as a place for science because it has no lab equipment. The best response, in line with the chapter, is
- A. Aanya is right — only labs count
- B. Aanya is right — kitchens are for cooking only
- C. Aanya is partly right — kitchens are useful only for chemistry
- D. Aanya is wrong — science is everywhere; the kitchen is a wonderful place to observe, ask 'what happens if…?' and do simple experiments
Q24. An NCF-2023-aligned Class 8 science teacher would BEST describe her role as
- A. A judge who marks right and wrong only
- B. A speaker who only delivers facts
- C. A monitor who keeps the children silent
- D. A facilitator who helps the child act like a young scientist — ask questions, design simple experiments, and explain observations
Q25. Which classroom plan best reflects 'inquiry-based learning' as modelled by Chapter 1 of Class 8 Curiosity?
- A. Dictate notes, then test recall in a quiz
- B. Ask a real-life question (e.g., 'Why does dough rise?'), let students propose variables, change one at a time, and discuss observations
- C. Show a video, then ask students to copy what they saw
- D. Read the chapter aloud and underline definitions
Q26. Two Class 8 students design experiments for 'Does oil temperature change how a puri puffs?' • Riya keeps the same dough thickness, same drop technique, and tries three oil temperatures. • Karan changes oil temperature AND dough thickness together to 'save time'. Whose design is better, and why?
- A. Karan, because he covers more variables in less time
- B. Both equally — design does not matter
- C. Karan, because the chapter says to change many things at once
- D. Riya, because she changes one variable at a time while keeping others constant — the chapter's rule for valid investigation
Q27. By using puri, batura and phulka as the worked example in Chapter 1, the chapter signals that
- A. Only Indian foods can be objects of scientific investigation
- B. Indian kitchens have nothing to do with science
- C. Students must avoid using everyday Indian items in experiments
- D. Familiar Indian foods and home settings are valid, rigorous starting points for scientific investigation
Q28. The chapter closes Chapter 1 with the words
- A. 'The end!'
- B. 'Read the next chapter!'
- C. 'Class dismissed!'
- D. 'Happy investigating!'
Q29. After Chapter 1, a Class 8 teacher tells her students: 'Don't just remember new facts — learn how to find new facts.' Whose words is she echoing?
- A. Her own ideas, unrelated to the chapter
- B. The chapter's own framing of investigation on
- C. A different textbook's preface
- D. A poem inside the chapter
Q30. Read three statements about the chapter's stance on where science happens. I. Real science can happen only in fancy laboratories. II. The kitchen at home is a wonderful place to observe and ask questions. III. Curiosity, careful observation and 'what happens if…?' are enough to begin a scientific investigation. Which are correct, per the chapter?
- A. I and II only
- B. II and III only
- C. I and III only
- D. Only I

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