Questions on Water Cycle
Multiple-Choice Questions: Water Cycle
1. What is the main source of energy that drives the water cycle?
A) Wind
B) Earth's core
C) Sun
D) Moon
E) Gravity
2. The process of water changing from liquid to gas is called:
A) Condensation
B) Precipitation
C) Evaporation
D) Transpiration
E) Infiltration
3. Which of the following processes returns water to the atmosphere?
A) Runoff
B) Precipitation
C) Condensation
D) Evaporation
E) Collection
4. What is the term for water vapor turning into liquid?
A) Transpiration
B) Infiltration
C) Evaporation
D) Condensation
E) Filtration
5. Precipitation occurs when:
A) Water condenses and falls from the atmosphere
B) The sun heats the oceans
C) Water evaporates from plants
D) Water is stored underground
E) Rivers flow to the sea
6. The movement of water into the ground is called:
A) Runoff
B) Condensation
C) Collection
D) Infiltration
E) Evaporation
7. What is runoff in the water cycle?
A) Water that falls from the sky
B) Water moving underground
C) Water that flows over the surface to rivers and lakes
D) Water released by plants
E) Water vapor in the air
8. Which process involves plants releasing water vapor?
A) Infiltration
B) Condensation
C) Transpiration
D) Evaporation
E) Collection
9. Water that collects in oceans, lakes, and rivers is part of:
A) Precipitation
B) Condensation
C) Collection
D) Transpiration
E) Infiltration
10. Clouds form due to:
A) Runoff
B) Evaporation
C) Condensation
D) Infiltration
E) Melting
11. What type of precipitation forms when temperatures are below freezing?
A) Rain
B) Snow
C) Dew
D) Fog
E) Hail
12. Which process of the water cycle is driven directly by solar energy?
A) Condensation
B) Precipitation
C) Evaporation
D) Runoff
E) Infiltration
13. The process of water returning to rivers and oceans is called:
A) Condensation
B) Runoff
C) Transpiration
D) Evaporation
E) Filtration
14. Infiltration is important because it:
A) Warms the soil
B) Forms clouds
C) Helps recharge groundwater
D) Causes rainfall
E) Produces saltwater
15. The water cycle is a closed system, meaning:
A) Water cannot be used more than once
B) Water leaves Earth’s surface permanently
C) The amount of water on Earth remains constant
D) The oceans are sealed off
E) Evaporation doesn’t happen anymore
16. The process where ice turns directly into vapor is called:
A) Evaporation
B) Transpiration
C) Sublimation
D) Condensation
E) Deposition
17. Which of the following is not a stage of the water cycle?
A) Evaporation
B) Combustion
C) Condensation
D) Precipitation
E) Infiltration
18. Groundwater can be found in:
A) Rivers only
B) Clouds
C) Aquifers
D) Oceans
E) Glaciers
19. Transpiration occurs primarily through:
A) Plant stems
B) Animal skin
C) Human lungs
D) Plant leaves
E) Ocean currents
20. What is the main purpose of the water cycle in nature?
A) Create wind
B) Maintain Earth's rotation
C) Recycle water through the environment
D) Build soil
E) Produce salt
Answer Key with Explanations
1. C – Sun
The Sun provides the energy that powers evaporation and transpiration, driving the entire cycle.
2. C – Evaporation
Evaporation is the process where water changes from liquid to vapor due to heat.
3. D – Evaporation
Evaporation (from bodies of water) and transpiration (from plants) return water to the atmosphere.
4. D – Condensation
Condensation is when water vapor cools and turns back into liquid, forming clouds.
5. A – Water condenses and falls from the atmosphere
Precipitation happens when condensed water becomes too heavy and falls as rain, snow, etc.
6. D – Infiltration
Infiltration is when water soaks into the soil and becomes part of groundwater.
7. C – Water that flows over the surface to rivers and lakes
Runoff is the movement of water on land that ends up in bodies of water.
8. C – Transpiration
Transpiration is the release of water vapor from plant leaves.
9. C – Collection
Collection is the gathering of water in bodies like lakes, oceans, and rivers.
10. C – Condensation
Clouds form when water vapor condenses into tiny droplets.
11. B – Snow
Snow forms when precipitation occurs in freezing temperatures.
12. C – Evaporation
Evaporation is directly powered by the Sun’s heat energy.
13. B – Runoff
Runoff is how water returns to lakes, rivers, and oceans after precipitation.
14. C – Helps recharge groundwater
Infiltration allows rainwater to seep into the ground, replenishing aquifers.
15. C – The amount of water on Earth remains constant
Earth’s water cycle is closed; water is recycled but not lost or gained significantly.
16. C – Sublimation
Sublimation is the transition of ice directly into vapor without becoming liquid.
17. B – Combustion
Combustion is a chemical reaction, not part of the water cycle.
18. C – Aquifers
Groundwater is stored in porous underground layers called aquifers.
19. D – Plant leaves
Transpiration primarily occurs through the stomata of plant leaves.
20. C – Recycle water through the environment
The main function of the water cycle is to ensure continuous movement and reuse of water.
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