I teach science, 6th gr. We have a new science curriculum that discusses in length the "Rock Cycle", see link:
http://www.minsocam.org/MSA/K12/rkcycle/rkcycleindex.html
My problem is this - Is it accurate to describe this as a cycle? It is obvious the Earth's crust has been shaped by erosion, but I don't think the ENTIRE surface has been through the "Rock Cycle" for even one cycle. It might be applicable to less than 1% of the mass of the crust, or more probably much less than even that. So, how can we describe this as a cycle if very little mass has actually been through it?! Is the terminology just for convience sake?
2006-11-11
08:02:29
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2 answers
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asked by
mr_r_bowman
3