Time Left:
600
sec
1. What is the process of water vapour turning into tiny water droplets called?
A. Freezing
B. Condensation
C. Evaporation
D. Melting
2. What happens when water is heated beyond its boiling point?
A. It turns into ice
B. It turns into steam
C. It turns into rain
D. It stays as water
3. Why do wet clothes dry faster on a windy day?
A. Wind slows evaporation
B. Wind carries water vapour away
C. Wind turns water into ice
D. Wind condenses water
4. What is the process by which ice turns directly into water vapour?
A. Melting
B. Evaporation
C. Sublimation
D. Freezing
5. What is the cooling effect of evaporation caused by?
A. Release of heat
B. Absorption of heat
C. Compression of air
D. Condensation of vapour
6. What process converts liquid water into solid ice?
A. Melting
B. Evaporation
C. Freezing
D. Condensation
7. What type of heat energy is absorbed by water during evaporation?
A. Kinetic energy
B. Thermal energy
C. Chemical energy
D. Potential energy
8. Which factor slows down the process of evaporation?
A. Low humidity
B. High temperature
C. High humidity
D. High wind speed
9. Water droplets forming on plants in the early morning are an example of:
A. Condensation
B. Evaporation
C. Freezing
D. Melting
10. Which of the following helps in the formation of clouds?
A. Freezing
B. Evaporation
C. Condensation
D. Melting
11. What process occurs when water boils?
A. Melting
B. Condensation
C. Evaporation
D. Freezing
12. Which of the following is a natural process that returns water to Earth’s surface?
A. Melting
B. Evaporation
C. Precipitation
D. Sublimation
13. What happens to the volume of water when it freezes into ice?
A. It increases
B. It decreases
C. It stays the same
D. It evaporates
14. Why does condensation happen more on cold surfaces?
A. Because cold surfaces release heat
B. Because cold surfaces absorb water
C. Because water vapour cools and turns into liquid
D. Because cold surfaces expand
15. How does water reach the atmosphere in the water cycle?
A. Through condensation
B. Through evaporation
C. Through precipitation
D. Through freezing
16. What is the key factor in the formation of hail or snow?
A. Evaporation
B. High temperature
C. Cooling of water vapour
D. Absorption of heat
17. What happens when water evaporates from an open container?
A. The water level rises
B. The water level stays the same
C. The water level decreases
D. The water freezes
18. What happens to water vapour in the air when it touches a cold surface?
A. It freezes
B. It evaporates
C. It condenses into water droplets
D. It expands
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