Presentation on theme: "Get to Know Your H2O If You Live in the US....."— Presentation transcript:
1Get to Know Your H2O If You Live in the US..... You MIGHT be a Water Hog!Get to Know Your H2O
2Water is Essential to Life on Earth We have the same water that was here 65 millions years ago.Water is in a continous cycle.There is no such thing as "new" water.
3Earth’s water is mostly salt water (97. 5%). The remaining 2 Earth’s water is mostly salt water (97.5%). The remaining 2.5% is fresh water, and most of the fresh water is frozen.Did you know that LESS than 1% of our water supply is readily available for use?
5In the US, 80-90% of our fresh water supply comes from groundwater Liquid WaterTemperature and air pressure determine when water is liquid. It cannot be too cold or too hot to remain a liquid and the air pressure must be relatively low.97.5% of Earth'sWater is Ocean WaterLakesRiversIn the US, 80-90% of our fresh water supply comes from groundwater
6Gaseous WaterYou see water in the form of gas, when you see……..CloudsGeysersSteamFogWater changes from liquid to gas when its heated. This gas is called water vapor. Although we can’t see it, water vapor is all around us. We even release water vapor into the air when we breath, and it’s also transpired from plants.
7Solid WaterIceFrostGlaciersPolar Ice CapsSolid: When water becomes very cold it freezes and changes from liquid to solid.Frozen water has a definite form and shape.
10Evaporation When liquid water heats up it becomes vaporized and changes into a gasWater vapor rises due to adifference in air pressureAs water vapor rises itbecomes cooler; the higherit rises the faster itcondensesSeawater evaporation ponds, on the Isle of Rhé off the coast of France, are used to obtain salt
11CondensationWater vapor condenses to liquid water under warm conditionsIn cold temperatures water vapor condenses to ice