1. The Water Cycle All living things require water
The water cycle controls the DISTRIBUTION of water
Water moves constantly around the environment
Water constantly changes forms

2. Condensation
Precipitation

3. Condensation Precipitation
Water vapor in air cools and changes into a liquid
Creates clouds, fog or dew
Precipitation
Liquid water forms and falls to Earth as rain, sleet, snow or hail

4. Surface run-off
Infiltration
Ground water

5. Surface run-off Infiltration Ground water
Water that runs off the ground and collects in lakes, rivers, oceans
Infiltration
Water soaks into the ground
Ground water
Water located underground
Ex. Aquifers, springs

6. Transpiration
Evaporation

7. Evaporation Transpiration Liquid water changes into water vapor (gas)
Water evaporates from leaves of plants

8. The AMOUNT of water on Earth always stays about the same
The same water particles that were present thousands of years ago are still around today
The particles simply change form and placement
DISTRIBUTION changes