Wednesday, December 12, 2007

How can we get electricity from water?

Engineers and scientists use water to generate electricity using dams and turbines. Water flows through the dam almost at free fall speed. There are special turbines at the bottom of the dam that will rotate with the flow of the water producing electricity.

Check out some dams in this pictures:
Hoover Dam. Nevada/Arizona border

United Kingdom

Glen Canyon Dam

This is a picture of the turbines:

The largest hydroelectric plant of the world is the Three Gorges Dam in China:

Animals also build dams. Beavers for example build dams to live in:

Here is a picture of a beaver dam:

And this is a beaver: