Wednesday 29 October 2014

Atmosphere

 http://www.edistribucion.es/anayaeducacion/8420042/unit_08.html

 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.

Pictures of the aurora australis


http://www.kidsknowit.com/interactive-educational-movies/index.php?educational-movies-type=Geography


What makes wind?





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