Water on Earth

Water on Earth

Read each question carefully and answer to the best of your ability. For multiple-choice questions, circle the correct option. For fill-in-the-blank questions, complete the sentence. For short answer questions, write your answer on the lines provided.

1. What percentage of Earth's surface is covered by water?

2. The process where liquid water turns into water vapor and rises into the atmosphere is called:

3. Most of the Earth's freshwater is stored in   and ice caps.

4. When water vapor cools and changes back into liquid water, forming clouds, this process is called  .

5. Label the parts of the water cycle in the diagram below.

6. All the water on Earth is freshwater.

7. The sun is the main source of energy that drives the water cycle.

8. Briefly explain why water is essential for life on Earth.