1. H2OH2O Water

2. Where is our water 97.5% of all water on Earth is saltwater or brackish water. 1.75% of all water is frozen..75% of all of the water on Earth is available for us to use. What is our main source for fresh water?  Groundwater

4. (WATER CYCLE) Hydrologic Cycle

5. Vocabulary Review Hydrosphere  water Lithosphere  land Atmosphere  air Biosphere  organisms

6. Steps in the Hydrologic Cycle Precipitation  Water falling from the sky

7. Steps in the Hydrologic Cycle Evaporation  Liquid water turns into water vapor  Heat is added

8. Steps in the Hydrologic Cycle Condensation  Water vapor turns in to liquid water  Heat is given off

9. Heat transfer When water changes states heat is transferred Where does the energy come from? Where does it go? Energy cannot be created or destroyed

10. Steps in the Hydrologic Cycle Runoff  The flow of water over land  Powered by gravity

11. Steps in the Hydrologic Cycle Transpiration  Water vapor given off by plants

12. Surface water Lakes, rivers, ponds

13. Steps in the Hydrologic Cycle Ground water  the water located beneath the earth's surface in soil pore spaces and in the fractures of rock formations

14. Groundwater Vocabulary Porosity is a measure of how much of a rock is open space. This space can be between grains or within cracks or cavities of the rock.

15. Permeability is a measure of the ease with which a fluid (water in this case) can move through a porous rock.

16. Aquifer a body of saturated rock through which water can easily move.

17. Water Table The upper surface of the zone of saturation Digging in the sand

19. Recharge Refilling of the aquifers Rain/snow percolates/seeps down in to the porous rock

21. Wetlands An area of land that is saturated with water

22. Wetlands Wetlands help cleanse our water Wetlands contain great biodiversity

23. Natural Cleaning of the Water Evaporation cleans the water Percolation filters the water Wetlands filter the water

24. Human Impact on Freshwater Pollution Buildings/Paving Destruction of wetlands