At Bodhiclasses, we believe in enabling students to reflect deeply and apply their understanding beyond the textbook. To support revision and academic success, we have created a Chapter 1 sample question paper for Class 7 Science – The Ever-Evolving World of Science, structured in accordance with school exam formats.
This includes:
- 10 Multiple Choice Questions (MCQs)
- 10 One-mark Questions
- 5 Two-mark Questions
- 5 Higher Order Thinking Skills (HOTS) Questions
A complete answer key follows the paper.
Maximum Marks: 40 | Time: 1 Hour
Section A: Multiple Choice Questions (1 mark each)
Q1. Which of the following best describes science?
A) Memorization of formulas
B) Reading about nature
C) Process of inquiry and discovery
D) Solving riddles
Q2. What causes day and night on Earth?
A) Earth’s revolution
B) Moon’s rotation
C) Earth’s rotation
D) Sun’s movement
Q3. A torch stops working because:
A) Wires are made of plastic
B) The switch is too small
C) The battery is exhausted
D) There is no light in the room
Q4. Which of the following changes is irreversible?
A) Water freezing
B) Ice melting
C) Cutting paper
D) Ripening of fruit
Q5. Early humans told time using:
A) Water clocks
B) Digital watches
C) Shadow position
D) Mobile apps
Q6. What type of materials are used to make a bulb glow?
A) Transparent materials
B) Insulators
C) Conductors
D) Fibres
Q7. The process by which water evaporates and returns as rain is called:
A) Transpiration
B) Filtration
C) Water cycle
D) Circulation
Q8. Plants make their own food using:
A) Water and soil only
B) Sunlight, carbon dioxide, and water
C) Oxygen and minerals
D) Light and salt
Q9. Light and shadow helped early people:
A) Make fire
B) Tell time
C) Cook food
D) Draw pictures
Q10. Which of the following is a scientific skill encouraged in this chapter?
A) Learning poems
B) Asking questions
C) Drawing cartoons
D) Copying answers
Section B: Very Short Answer Questions (1 mark each)
Q11. What does the term “ever-evolving” in science suggest?
Q12. Give one example of a reversible change.
Q13. Name one device that runs on electrical energy.
Q14. What does science encourage us to do?
Q15. How does heat affect the state of matter?
Q16. Which celestial body causes eclipses along with the Earth?
Q17. What change occurs when water is heated?
Q18. Mention one life process in humans.
Q19. What is the significance of the Sun in the water cycle?
Q20. Define ‘curiosity’ in your own words.
Section C: Short Answer Questions (2 marks each)
Q21. Explain with an example how a material’s property can determine its use.
Q22. Why is asking questions important in science?
Q23. How is the water cycle an example of a continuous natural process?
Q24. Why is light essential for plant life?
Q25. Describe two physical changes you observe in everyday life.
Section D: Higher Order Thinking Skills (HOTS) – 3 marks each
Q26. A child observes that a metal spoon feels hotter than a plastic spoon when placed in the same hot soup. Explain why this happens using the concept of conductivity.
Q27. Design an experiment at home to test whether a material is a conductor or insulator.
Q28. Your shirt has a turmeric stain. Soap makes it red. What does this suggest about the chemical nature of soap?
Q29. Compare the changes in a melting ice cube and a ripening banana. What type of changes are these?
Q30. Why is it important to understand how eclipses happen and not be afraid of them?
Answer Key and Solution Sheet
Section A: MCQ Answers
- C
- C
- C
- D
- C
- C
- C
- B
- B
- B
Section B: One Mark Answers
- Science keeps changing and growing with new discoveries.
- Melting of ice.
- Electric fan or torch.
- To ask questions and explore.
- Heat changes solids to liquids and liquids to gases.
- The Moon.
- It turns into steam (evaporation).
- Respiration or digestion.
- It causes evaporation in the water cycle.
- Curiosity is the desire to know or learn something.
Section C: Two Mark Answers
- Metal is used in wires because it is a good conductor of electricity.
- Asking questions helps to explore new ideas and find better answers.
- Water evaporates, condenses, and returns as rain continuously.
- Light is needed for photosynthesis, which allows plants to make food.
- Ice melting, paper tearing.
Section D: HOTS Answers
- Metals are good conductors of heat, so they transfer heat quickly, unlike plastic which is an insulator.
- Take a bulb, battery, and wires. Place the material between two wire ends. If the bulb lights up, it’s a conductor.
- Soap is basic in nature. Turmeric turns red in a base, indicating a chemical reaction.
- Melting is a physical, reversible change. Ripening is a chemical, irreversible change.
- Understanding eclipses scientifically removes superstitions and promotes logical thinking.
