Plate Tectonics IAN 2

Plate boundaries

Where the plates meet


One boundary change causes changes at other boundaries

Divergent boundaries

Plates move away from each other,


Cause mid-ocean ridges, rift valleys


Creates new crust

Convergent boundaries

Two plates come together,


Denser ocean crust/plates sink under continental crust


Subduction zone

Ocean plates sink into mantle, melt, recycled


Volcanoes form, earthquakes happen


Deep-sea trenches form


Subducted plates melt form new magma


Mountain ranges

Continental plates converge (crash) to form mountains