8th grade science chpt 7
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earths crust and part of the upper mantle
theory that combined continental drift and seafloor spreading
hot, less dense material below the Earths crust rises toward the surface at mid-ocean ridges
the entire cycle of heating rising, cooling and sinking
boundary between two plates that are moving apart
Where two plates move together
area where oceanic plates subducts, or goes down into the mantle
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