Monday, December 27, 2010

wind power ( how it works )

http://bux.to/?r=tankahban

THe sun heats our atmosphere unevenly , so some patches become warmer than others .

These warm patches of air rise , other air blows in to replace them - and we feel a wind blowing
We can use the energy in the wind by building a tall tower , with a large propeller on the top

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