Solar energy is energy that is present in sunlight. It has been used for thousands of years in many different ways by people all over the world. As well as its traditional human uses in heating, cooking, and drying, it is used today to make electricity where other power supplies are absent, such as in remote places and in space. It is becoming cheaper to make electricity from solar energy and in many situations it is now competitive with energy from coal or oil.
Here are some videos about solar energy:
http://video.nationalgeographic.com/video/environment/energy-environment/solar-power/
http://www.neok12.com/php/watch.php?v=zX6661745f06417d615e4d67&t=Energy-Sources
And here is another one about renewable energies in general:
http://video.nationalgeographic.com/video/environment/energy-environment/great-energy-challenge/
Here are some quizes that you can do to find out what you know about solar energy!
http://science.howstuffworks.com/environmental/energy/solar-power-quiz.htm
http://science.howstuffworks.com/environmental/energy/solar-power-quiz.htm
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