1. Managing Earthquakes and Volcanoes Use this PowerPoint in conjunction with your books to help you revise

2. What do you need to revise? Where earthquakes and volcanoes are found Structure of the earth How plates move (convection currents) Plate boundaries (constructive, destructive, conservative) Mt St Helen’s volcanic eruption: causes and impacts (on people and environment) Kashmir and Los Angeles earthquakes: impacts explained (think about the difference between rich and poor countries) Reasons why people live near volcanoes

3. Where are earthquakes and volcanoes found? Earthquake and volcanoes are found near/on plate boundaries

4. Structure of the Earth

5. Plate boundaries Plates meet in three ways: By moving apart (constructive) By moving together (destructive/collision) By moving past each other (conservative) Kung Fu plate Boundaries video

6. Plate boundaryDiagramExplanation ConstructiveTwo plates move apart and magma rises up to fill the gap. This forms new crust and create volcanoes. Earthquakes can also happen as friction builds up when the crust moves over the mantle. DestructiveAn oceanic and a continental plate move together and the heavier oceanic crust is forced/subducts under the continental plate. The oceanic crust melts and creates new magma which then rises up through the continental crust to form a volcano. Earthquakes also happen here as friction builds up when the two plates move past each other. CollisionTwo continental plates move together. Neither can sink so both are forced upwards to form mountains. ConservativeTwo plates are sliding past each other (in opposite or the same direction) but at different speeds. This causes friction to then build up which is eventually released as an earthquake. No volcanoes happen here.

7. Mt St Helens Mt St Helen’s song

8. Kashmir/Los Angeles Earthquake How does being in a rich or poor country affect what the effects of an earthquake will be?

9. Why do people live near volcanoes and earthquakes? Reasons Tourism Geothermal energy Fertile soils Too poor to move Family links/tradition Mining Sacred placeDon’t care