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