1. 1. THE GLOBAL WATER CYCLE Kumu Pa Nakea October 2014
2. 2. WHY DO WE CARE ABOUT WATER?
3. 3. All life on Earth requires some form of water to survive.
4. 4. Ola I ka wai a ka opua There is life in the water from the clouds! ~ Pukui Olelo Noeau No. 2482 WATER IS A VITAL SUBSTANCE Water is necessary for the development & nourishment of life.
5. 5. WHY WE CARE ABOUT WATER? Can you survive without water? Where do you get the water you use at home? Where is most of the water on Earth located? Is there such a thing as new water? What are the processes involved in the global water cycle?
6. 6. Oxygen HydrogenHydrogen 75% of Earth is covered by water, and water richclouds fill the sky. Earth is a water planet! Water Molecule H20
7. 7. WHERE IS THE WATER? 90% of the water is in the Ocean. Freshwater seems abundant, but is in limited supply. Only 3% of our planet is freshwater. 2% is contained in the glaciers & ice sheets 1% is found in lakes, rivers & wetland areas
8. 8. WHAT IS THE WATER CYCLE? WHAT ARE SOME COMPONENTS OF THE WATER CYCLE?
9. 9. WATER CYCLE Describes how the water evaporates from the surface of the earth, rises into the atmosphere, cools and condenses into rain or snow in clouds, and falls again to the surface as precipitation. The sun heats the Earths surface water, causing that surface water to evaporate (gas). This water vapor then rises into the earths atmosphere where it cools and condenses into liquid droplets.
10. 10. WATER CYCLE These droplets combine and grow until they become too heavy and fall to the earth as PRECIPITATION (liquid if rain, solid if snow). The water falling on land collects into the oceans, where it will once more evaporate. The cycling of water in and out of the atmosphere is a significant aspect of weather patterns on Earth.
11. 11. THE WATER CYCLE IN HAWAII
12. 12. COMPONENTS OF THE WATER CYCLE Evaporation & Transpiration Condensation Precipitation Infiltration Collection
13. 13. EVAPORATION When water is heated by radiant energy it turns into water vapor.
14. 14. TRANSPIRATION Transpiration is evaporation from plants.
15. 15. CONDENSATION When water vapor cools, molecules join together and form clouds.
16. 16. PRECIPITATION When clouds get heavy the water falls as rain, sleet, snow or hail.
17. 17. INFILTRATION The process by which water on the ground surface enters the soil.
18. 18. COLLECTION This is when water that falls from the clouds as rain, snow, hail or sleet, collects in the oceans, rivers, lakes and streams.
19. 19. WATER IS PRACTICALLY EVERYWHERE ON EARTH. Water is the only common substance that can exist naturally as a gas, liquid or solid at a small range of temperatures & pressures.
20. 20. WHAT PARTS OF THE WATER CYCLE REQUIRE ENERGY FROM THE SUN?
21. 21. ENERGY FROM THE SUN STAGES THAT REQUIRE SOLAR RADIATION (HEAT). Solar Radiation Evaporation Transpiration Infiltration Runoff Precipitation Condensation Groundwater
22. 22. WHICH PARTS OF THE WATER CYCLE REQUIRE THE WATER MOLECULES TO GIVE AWAY HEAT ENERGY (COOL DOWN)?
23. 23. CONDENSA TION STAGES THAT REQUIRE WATER TO GIVE OFF HEAT (COOL DOWN). Solar Radiation Evaporation Transpiration Infiltration Runoff Precipitation Condensation Groundwater
24. 24. WHAT PARTS OF THE WATER CYCLE ARE CAUSED BY THE FORCE OF GRAVITY?
25. 25. GRAVITY STAGES DRIVEN BY FORCE OF GRAVITY Solar Radiation Evaporation Transpiration Infiltration Runoff Precipitation Condensation Groundwater
26. 26. WHAT IS HAPPENING IN YOUR DIAGRAM? Explain the processes involved in the water cycle in your diagram. What effect will the sun have on the water cycle? The shade? What caused the water to evaporate from the ocean? Where does the water go?