Convergent Boundary: A bond that between tectonic plates that are colliding.
Divergent Boundary: A boundary between two tectonic plates that moves away from each other.
Transform Boundary: A boundary between tectonic plates that slide past each other horizontally.
Convention Currents: Its a collective movement of groups or aggregates of molecules within fluids and rheids through diffusion.
Oceanic crust: Part of earth's lithosphere the surface is oceanic basins. It's composed of mafic rocks or sima which is rich in iron and magnesium.
Continental crust : Is a layer of igneous sedimentary and metamorphic rock which forms the continents and the areas shallow seabed knows as continental shelves