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1. Which of the following is the solid form of water?
A. Water Vapour
B. Ice
C. Steam
D. Rain
2. What is the process called when water turns into water vapour?
A. Condensation
B. Freezing
C. Evaporation
D. Melting
3. What happens to water when it is cooled to 0°C?
A. It turns into steam
B. It freezes into ice
C. It evaporates
D. It stays the same
4. The process of turning water vapour into liquid water is called:
A. Evaporation
B. Melting
C. Condensation
D. Freezing
5. Water droplets forming on the outside of a cold glass is due to:
A. Freezing
B. Evaporation
C. Condensation
D. Melting
6. In which state does water spread out and fill the available space?
A. Solid
B. Liquid
C. Gas
D. None
7. Which process is involved in drying clothes under the sun?
A. Condensation
B. Freezing
C. Evaporation
D. Melting
8. What happens to water Vapour when it cools down in the atmosphere?
A. It turns into ice
B. It turns into rain
C. It turns into fog
D. It turns into liquid water
9. What is the process of changing ice into water called?
A. Melting
B. Freezing
C. Condensation
D. Evaporation
10. Which of the following is an example of evaporation?
A. Water boiling into steam
B. Water turning into ice
C. Clouds forming in the sky
D. Ice melting into water
11. What is the natural process in which water evaporates from the Earth’s surface and comes back as rain?
A. Water cycle
B. Condensation
C. Freezing
D. Evaporation
12. What causes water to freeze into ice?
A. Adding heat
B. Removing heat
C. Stirring water
D. Adding salt
13. Which factor increases the rate of evaporation?
A. Low temperature
B. High humidity
C. Wind
D. No air movement
14. Which of the following is true about water in its gaseous state?
A. It retains its shape
B. It has a fixed volume
C. It spreads out to fill the space
D. It is visible
15. Which form of water has the least energy?
A. Water vapour
B. Ice
C. Liquid water
D. Steam
16. Why does water evaporate faster on a hot day?
A. Because of low humidity
B. Because heat increases the energy of water molecules
C. Because of wind
D. Because of condensation
17. What is the most common cause of rain?
A. Evaporation of water from oceans
B. Condensation of water vapour in clouds
C. Melting of ice caps
D. Rising temperature
18. The process of freezing is the reverse of which process?
A. Condensation
B. Evaporation
C. Melting
D. Precipitation
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