Plate boundries

This is were two continental plates move together.

They can form fold mountain ranges like the Alps

They can cause earthquakes but NOT volcanoes.

When two plates slide past each other

these plates can get stuck on each other causing a buildup of pressure

this pressure becomes too great and is suddenly released causing an earthquake

no volcanoes occur here

no land is created or destroyed

when a oceanic plate and a continental plate move together.

the oceanic plate is denser so it is pushed underneath the continental plate forming a subdution zone

the oceanic plate i melted by friction between the two plates and this forms a magma chamber.

The magma can rise through cracks in the plate to form volcanoes.

the continental crust is compressed to form composite cone volcanoes and fold mountains

earthquakes also occur

These plates move apart.

they create new land:

• as they move apart magma rises up through the gap created
• this cools to form new land when it reaches the surface
• they can form sheild volcanoes, and mid ocean ridges like the mid atlantic ridge

volcanoes and earthquakes happen here