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the crust and upper mantel are cracked into a number of pices called tectonic plates ?
explain why these plates move ??????
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- Anonymous10 years agoFavorite Answer
"...Convection currents beneath the plates move the plates in different directions.
The source of heat driving the convection currents is radioactive decay which is happening deep in the Earth. ..."
http://www.moorlandschool.co.uk/earth/tectonic.htm
http://www.platetectonics.com/book/page_4.asp
Source(s): Google search on "explanation why tectonics plates move" M.S. in geology / planetary geologist
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