plates are moving AWAY from each other

plates are moving TOWARDS each other

plates are moving past each other

where pieces of the Earth's crust divides on land and a deep valley forms

occur near mid-ocean ridges where new crust is being added (seafloor spreading)

can form mountains & volcanoes

where a rift valley can form

the movement of this boundary can cause EARTHQUAKES

1 oceanic plate-1 continental plate collide, the plate sinks and subducts.

2 oceanic plates pull apart a crack in the ocean floor appears and magma oozes up from the mantle

a fault can form which is a crack in the Earth's crust

the theory that pieces of Earth's lithosphere are in constant motion driven by convection currents in the mantle