solid liquid gas song
http://www.youtube.com/watch?v=btGu9FWSPtc
Les différences entre un solide un liquide un gaz.
http://profmokeur.ca/chimie/imchim/molecules.swf
Friday 21 December 2012
Monday 17 December 2012
Monday 27 August 2012
Monday 30 January 2012
Tuesday 10 January 2012
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