EarthquakesEarthquakes

• Manchester

• Haiti

• What caused the Haiti earthquake?

What causes earthquakes?What causes earthquakes?

• The Earth’s surface is made up of plates

• These plates move

What causes earthquakes?What causes earthquakes?

• When they collide mountains form

What causes earthquakes?What causes earthquakes?

• When they move apart molten magma rises up to fill the gaps and volcanoes may form

What causes earthquakes?What causes earthquakes?

• When they grate against each other:– pressure builds up over time– when the pressure is released suddenly an

earthquake happens.

Any questions?Any questions?