1. Water Cycle

2. Energy Source
The SUN is the driving force of the water cycle

3. Evaporation Water moving from a liquid to a gas
ENERGY PUT IN = HEATED UP

4. Condensation Water moving from a gas to a liquid
ENERGY TAKEN OUT = COOLED DOWN

5. Precipitation Water condensing in a cloud and falling to the Earth
ENERGY TAKEN OUT = COOLED DOWN
Rain, snow, sleet, hail

7. Transpiration
Plants and animals losing water vapor into the atmosphere
ENERGY PUT IN = HEATED UP

8. Sublimation
Water moving from a solid to a gas skipping the liquid stage
ENERGY PUT IN = HEATED UP
Happens high in the mountains

9. Runoff Water flowing on the surface of Earth to a lower area
Caused by gravity

10. Infiltration Water soaking into the ground from the surface
Depends on how porous the soil is

11. Ground Water
Any water stored below the surface of the Earth

12. Aquifer
A Collection of groundwater storage

13. Water Table The top of the aquifer
Changes in depth from place to place

14. Flooding Occurs when the ground cannot absorb any more water
Too frozen or saturated
Rains too much, too fast

15. Efficiency of the Water Cycle
There is the same amount of water on Earth today as there was 1000 years ago

16. Water Facts
Only 3% of all the water on Earth is freshwater (97% is ocean water)
Water can dissolve more substances than any other liquid, including sulfuric acid
30% of all freshwater is underground
The water found in lakes, streams, rivers, swamps and ponds makes up only 0.3% of the world’s fresh water
68% of all fresh water is trapped in glaciers

17. Water Facts Approximately 70% of the human body is water
The average American uses 100 gallons of water per day
Approximately 400 billion gallons of water are used in the United States daily
Americans use more water each day by flushing the toilet than showering or any other activity
Europeans use 50% less water than Americans

18. Water Facts
More than 25% of bottled water comes from the same place that tap water comes from
It takes 6.5 years for an American household to use the amount of water that it takes to fill an Olympic swimming pool (660,000 gallons)
It takes 7.5 years for an American household to use the amount of water that falls over Niagara Falls in 1 minute (750,000 gallons)