Water on Earth
Explore the water cycle, states of water, and its distribution on Earth with this Grade 7 science worksheet.
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Water on Earth
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Date:
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Read each question carefully and answer to the best of your ability.
1. What percentage of Earth's surface is covered by water?
29%
50%
71%
90%
2. Which of the following is NOT a stage of the water cycle?
Evaporation
Condensation
Sublimation
Transpiration
3. The process by which plants release water vapor into the atmosphere is called .
4. Water that flows over the land surface into rivers and lakes is known as .
5. Label the processes (Evaporation, Condensation, Precipitation, Collection) on the diagram below.
6. Most of the Earth's freshwater is found in rivers and lakes.
True
False
7. Salinity refers to the amount of dissolved salts in water.
True
False
Match each term with its definition.
8. Evaporation
a. Water falling from clouds
9. Condensation
b. Water changing from liquid to gas
10. Precipitation
c. Water vapor turning into liquid droplets
11. Explain why fresh water is a limited resource even though Earth is covered mostly by water.