GCSE Geography, The restless earth (simple)
- Created by: jonnyainslie
- Created on: 22-12-13 19:09
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- The Restless Earth
- Earthquakes
- Conservative Plate Margins
- When the two plates ride against each other it causes friction. this build up of pressure is finally released.
- Destructive Plate Margins
- When the oceanic plate sub-ducts under the continental, pressure builds up. This pressure is released.
- Epicenter
- The epicenter is the place on the surface of the earth, directly above the focus.
- Focus
- The point where the seismic waves come from inside the earth.
- Conservative Plate Margins
- Volcanoes
- Cone
- Caused when the slow moving, lumpy andasetic lava builds up and eventually cools.
- Less frequent yet violent eruptions. Grey eruptions.
- Shield
- Caused when the basaltic lava runs far and eventually cools
- Frequent but not violent eruptions. Red eruptions. High silica content in lava.
- Cone
- Tsunamis
- Tsunamis are caused by a 'stick & slip' motion. When plates are subducted they can get stuck but eventually the pressure that has built up is released when the plate flicks up. This causes a huge wall of water.
- Earthquakes
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