The document discusses different forms of energy from the sun and how wind energy is produced. It explains that wind is caused by uneven heating of the Earth's surface from the sun. Methods for measuring wind speed like wind vanes and anemometers are mentioned. The amount of energy a wind turbine can produce depends on the size of the turbine and the speed of the wind. The blades of a wind turbine play a key role in capturing the wind and converting it to mechanical energy.

1. Investigate Green Schools Lesson 4 Wind Energy

3. 6 forms of energy A story…

4. The sun was out… (Nuclear)

5. And shining on the earth. (Radiant)

6. It was such a nice, sunny day, some people were out playing a game of catch… (Mechanical)

7. When the sun’s rays hit the people, they got hot. (Thermal)

8. It wasn’t only the people enjoying the sunny day. The plants used the sun’s radiant energy to make food for themselves. (Chemical)

9. But before long, the clouds covered the sun and a thunderstorm rolled in. (Electrical)

10. The End (Electrical) (Chemical) (Thermal) (Mechanical) (Radiant) (Nuclear)

11. Coal Chain A review…

12. now try to turn it into a Wind Chain

13. what is wind?

14. wind: Wind is air in motion. But what causes it to move?

15. Wind is produced by the uneven heating of the earth’s surface by energy from the sun.

17. how do we measure the wind? Wind Vane Anemometer

18. How do we use that information?

20. Amount of energy produced depends on size of the turbine and the speed of wind

25. The blades of a wind turbine have the most important job of any wind turbine component – they must capture the wind and turn it into usable mechanical energy .

26. Which Blades are Best? Activity