convergent, where plates move into one another, divergent where plates move apart; and transform, where plates move sideways in relation to each other. At a Convergent boundary continental crust is created and oceanic crust is destroyed and it’s a slow process. At a divergent boundary new crust is generated as the plates pull away from each other and it’s a slow process. At a transform boundary crust is neither produced nor destroyed as the plates slide horizontally past each other and i believe it’s fast.