Changes

We get enery from the sun in the form of solar radiation.It reaches the earth in the form of small wave packets called '''photons'''[http://en.wikipedia.org/wiki/Photons].The source of solar energy is continuous '''thermo nuclear fussion'''[http://en.wikipedia.org/wiki/Nuclear_fusion] taking place in the sun.

We get enery from the sun in the form of solar radiation.It reaches the earth in the form of small wave packets called '''photons'''[http://en.wikipedia.org/wiki/Photons].The source of solar energy is continuous '''thermo nuclear fussion'''[http://en.wikipedia.org/wiki/Nuclear_fusion] taking place in the sun.

[[File:solar.jpg|400px]]

[[File:solar.jpg|200px]]

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===Activities===

===Activities===