sábado, 10 de enero de 2015

Rock games rock!!!!

http://www.learner.org/interactives/rockcycle/swfs/rockCycle.swf
http://www.eduplace.com/kids/hmsc/activities/simulations/gr1/unitc.html
http://www.bbc.co.uk/schools/scienceclips/ages/7_8/rocks_soils_fs.shtml

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