Components of WaterWater Supply, Water Power

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

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

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

Built curved or larger at the bottom for pressure increases with depth

Moving water turns turbines under dam

Turbines provide power

Dams

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

Niagara Falls

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

Fun facts to learn all about Dams! http

://www.sciencekids.co.nz/sciencefacts/engineering/dams.html

Play this game to learn about other clean energy!

http://climatekids.nasa.gov/review/power-up/SolarAndWindGame.swf

Activity

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