1. Components of Water Water Supply, Water Power

2.  Modern cities need huge amounts of water  New York, consumes 7 billion liters  Vast network of pipes from lakes, rivers and reservoirs pumps water through cities  Water must be cleaned for use Water Supply

3.  Sluice gates let water from reservoirs into treatment plants  Sieved to remove algae  Sifted through gravel and sand to filter smaller impurities  Chlorine added to kill germs  Water reaches main supply pumps Water Supply

4.  Water has enormous power potential  Ancient Romans used paddle wheels to grind grain  Fossil Fuel consumption makes vast potential for future water power Water Power

5.  Built curved or larger at the bottom for pressure increases with depth  Moving water turns turbines under dam  Turbines provide power Dams

6.  Hydro electric power clean, but dams are expensive and make for environmental problems  Still in progress, must deal with small waves and large storms  Seeking development out at sea for full power potential Wave Power

7. Niagara Falls 1 Million Liters Per Second is dropped over Niagara Falls at full force

8.  Fun facts to learn all about Dams!  http://www.sciencekids.co.nz/sciencefacts/engineerin g/dams.html http://www.sciencekids.co.nz/sciencefacts/engineerin g/dams.html  Play this game to learn about other clean energy!  http://climatekids.nasa.gov/review/power- up/SolarAndWindGame.swf Activity

9.  Now that the unit is done, consider these questions and submit answers to me  Where is water found on Earth?  Where does water come from?  How does water get from one place to another on Earth?  What happens in puddles?  Where do you think all the water goes? Critical Thinking