Convert BOUNDARY
Convert boundaries are when two boundaries move toward one another and collide.
dIVERGENT bOUNDARY
Divergent boundaries are when plates move apart from each other.
TRANSFORM BOUNDARY
Transform boundaries are places where plates slide sideways past each other.
convection currents
Convection is the concerted collective movement of groups or aggregates of molecules within fluids and rheids, either through advection or through diffusion or as a combination of both of them.
oceanic crust
Oceanic crust is the part of Earth's lithosphere that surfaces in the ocean basins.
continental crust
the continental crust is the layer of igneous, sedimentary, and metamorphic rock.