Convection currents in the asthenosphere move plates in the lithosphere.

The movement of a fluid caused by differences in temperature and density.

The pull of gravity on a plate causing the plate to sink back into the mantle.

When new rock forms it pushes old rock further from the ridge.

A plate boundary were plates pull apart from each other.

A rift formed on land caused by a divergent boundary underneath.

A ridge at the bottom of the ocean where new ocean crust is formed.

A plate boundary where the plates crash into each other.

Volcanoes formed by oceanic crust and continental crust crashing into each other.

Islands formed from two oceanic crust plates crash into each other.

Mountains formed when two continental crust plates crush into each other.

Occurs when one plate goes under another plate and goes back into the mantle.

Forms at subduction zones where one plate goes under another plate.

A plate boundary where two plates slide past each other.

Earthquakes are caused when two plates slide past each other.

A fault caused by two plates sliding past each other in California.