http://en.wikipedia.org/wiki/Aurora
Auroras are caused by charged particles, mainly electrons and protons, entering the atmosphere from above causing ionisation and excitation of atmospheric constituents, and consequent optical emissions. Incident protons also produce emissions, and convert to hydrogen atoms by gaining an electron from the atmosphere.
http://www.kidsknowit.com/interactive-educational-movies/index.php?educational-movies-type=Geography
What makes wind?
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