Chapter 7

Lesson 2: The Water Cycle

I. Why does water change its state of matter on Earth?

• Because the sun heats the water, then it

cools

a.Evaporation – liquid changes to gas (heating)

b.Condensation – gas changes to liquid (cooling)

c. Precipitation – water is too heavy for the cloud so it falls to Earth

II. What is the water cycle?

• Movement of water between the Earth and air

6. Run off creates erosion (wearing away) of the land

6

1.Heat

2. Condensation

3. Evaporation

4. Precipitation

5. Ground Water

Water Cycle Game