People have used the power of wind for thousands of years. - презентация

1 People have used the power of wind for thousands of years.

2 Windmills were simple turbines that could produce mechanical energy.

3 Nowadays farmers use windmills to make a small amount of electricity – enough to power a few farm machines.

4 To make enough electricity for lots of people, power companies build wind farms, with lots of wind turbines.

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6 Wind farms are built in flat, open areas where the wind blows at high speed.

7 Bigger is better – the bigger the wind turbine, the more wind it reaches and the more electricity it produces.

8 This diagram shows some parts inside a wind turbine: The wind turns the blades, they turn the turbine. The generator makes electricity and sends this power along the lines.

9 And this video will show you a wind turbine in action.

10 Definitely! Some schools in Europe and in the USA have their own wind farms!

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