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List three boundary types and give the relative motion for each type

A. Divergent plate boundaries move apart
B. Convergent plate boundaries move in together
C. Transform plate boundaries move past one another


State whether sea floor is created, destroyed or neither at divergent, convergent, and transform plate boundary.

New sea floor is created at divergent plate boundary
Old sea floor is destroyed at convergent plate boundary
Neither at transform boundary


Explain why a Rift Valley forms at the mid ocean ridges summit

Because material beneath the mid ocean ridge fills the void by the separating plates of lithosphere