MCQs-Chapter 1-The Ever-Evolving World of Science-Class 7-Science

 Multiple Choice Questions-Chapter 1-The Ever-Evolving World of Science

******************************

📚  Multiple Choice Questions (MCQs)

1. Science is best described as:

   • (a) Memorizing facts

   • (b) Performing experiments

   • (c) A way of thinking and discovery

   • (d) Reading textbooks

   • Answer: (c)

2. What inspired early explorations of flight?

   • (a) Birds

   • (b) Paper planes

   • (c) Clouds

   • (d) Rockets

   • Answer: (b)

3. Which process involves heat making changes faster?

   • (a) Freezing

   • (b) Evaporation

   • (c) Condensation

   • (d) Melting

   • Answer: (d)

4. Materials are classified based on:

   • (a) Color

   • (b) Properties

   • (c) Size

   • (d) Shape

   • Answer: (b)

5. What flows underground after rainfall?

   • (a) Air

   • (b) Lava

   • (c) Water

   • (d) Light

   • Answer: (c)

6. What helps circulate nutrients in the body?

   • (a) Blood

   • (b) Air

   • (c) Bones

   • (d) Muscles

   • Answer: (a)

7. Plants prepare their own food by:

   • (a) Eating other plants

   • (b) Photosynthesis

   • (c) Respiration

   • (d) Digestion

   • Answer: (b)

8. Early humans measured time by:

   • (a) Clocks

   • (b) Watching shadows

   • (c) Counting stars

   • (d) Using sand timers

   • Answer: (b)

9. A torch battery that runs out is an example of:

   • (a) Reversible change

   • (b) Irreversible change

   • (c) No change

   • (d) Physical change

   • Answer: (b)

10. What phenomenon causes eclipses?

    • (a) Rotation of Earth

    • (b) Shadows of celestial bodies

    • (c) Falling stars

    • (d) Ocean tides

    • Answer: (b)

11. Which state of water falls from clouds?

    • (a) Gas

    • (b) Liquid

    • (c) Solid

    • (d) Plasma

    • Answer: (b)

12. Curiosity is most important for:

    • (a) Memorizing

    • (b) Questioning

    • (c) Forgetting

    • (d) Sleeping

    • Answer: (b)

13. What process turns water into vapor?

    • (a) Melting

    • (b) Evaporation

    • (c) Freezing

    • (d) Boiling

    • Answer: (b)

14. Our body’s growth in middle school is due to:

    • (a) Bones stretching

    • (b) Life processes

    • (c) Exercise

    • (d) Jumping

    • Answer: (b)

15. What allows humans to read books at night?

    • (a) Fire

    • (b) Artificial light

    • (c) Shadows

    • (d) Reflected sunlight

    • Answer: (b)

16. Changes that cannot be reversed include:

    • (a) Melting of ice

    • (b) Breaking a rock into pebbles

    • (c) Dissolving salt

    • (d) Boiling water

    • Answer: (b)

17. Metals are generally:

    • (a) Poor conductors

    • (b) Good conductors

    • (c) Non-conductors

    • (d) Transparent

    • Answer: (b)

18. Non-metals are generally:

    • (a) Hard

    • (b) Good conductors

    • (c) Poor conductors

    • (d) Shiny

    • Answer: (c)

19. Water cycle involves:

    • (a) Only evaporation

    • (b) Only condensation

    • (c) Evaporation and precipitation

    • (d) Freezing

    • Answer: (c)

20. Light and shadows help us understand:

    • (a) Only colors

    • (b) Only brightness

    • (c) Nature of light

    • (d) Smells

    • Answer: (c)

21. What happens when light is blocked?

    • (a) Reflection

    • (b) Shadow formation

    • (c) Refraction

    • (d) Vibration

    • Answer: (b)

22. Paper planes were an early step toward understanding:

    • (a) Chemistry

    • (b) Mechanics

    • (c) Flight

    • (d) Magnetism

    • Answer: (c)

23. Heat transfer by direct contact is:

    • (a) Radiation

    • (b) Convection

    • (c) Conduction

    • (d) Insulation

    • Answer: (c)

24. Which natural force causes day and night?

    • (a) Earth’s rotation

    • (b) Moon’s revolution

    • (c) Earthquake

    • (d) Wind

    • Answer: (a)

25. Evaporation causes:

    • (a) Water cooling

    • (b) Water heating

    • (c) Water solidifying

    • (d) Water vanishing without a trace

    • Answer: (a)

✅ 5 True/False

1. Science is only about memorizing facts. (False)

2. Photosynthesis occurs in plants. (True)

3. Metals are poor conductors of electricity. (False)

4. Water vapor condenses to form clouds. (True)

5. Light and shadows have no role in space phenomena. (False)

✏️ 5 Fill in the Blanks

1. Paper planes inspired scientific explorations of __________.
   Answer: flight

2. Early humans used __________ to measure time.
   Answer: shadows

3. __________ is the process where water changes into vapor.
   Answer: Evaporation

4. Plants make their food through __________.
   Answer: photosynthesis

5. __________ conduct electricity well.
   Answer: Metals

❓ 5 Assertion-Reason Questions

1. Assertion: Water evaporates faster when heated.
   Reason: Heat gives energy to water molecules to escape into air.

   • Answer: (a)

2. Assertion: Metals are non-conductors of electricity.
   Reason: Metals are hard substances.

   • Answer: (c)

3. Assertion: A melting ice cube is an irreversible change.
   Reason: The process cannot be undone.

   • Answer: (d)

4. Assertion: Light is essential for seeing objects.
   Reason: Light reflects from objects into our eyes.

   • Answer: (a)

5. Assertion: Our body stops growing after primary school.
   Reason: Life processes stop working after childhood.

• Answer: (d)

🔗 5 Match the Following:

   

Column A	Column B
1.     Paper plane	A.     Inspired flight studies
2.     Photosynthesis	B.     Food production in plants
3.     Water cycle	C.     Evaporation and precipitation
4.     Rotation of Earth	D.     Causes day and night
5.     Metals	E.     Good conductors of electricity

 Answer: 1-A, 2-B, 3-C, 4-D, 5-E

*******************************************************