Plate Margins Flashcards
Describe the physical processes that happen at a conservative plate margin.
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At a conservative margin, two plates move parallel to each other. They can be moving in the same or opposite directions. Pressure builds along the margin of tectonic plates. As friction is overcome the rock fractures releasing energy as an earthquake.
Describe the physical processes that happen at a conservative plate margin.
Why are volcanoes not found along conservative plate margins?
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This is because a conservative plate margin, sometimes known as a transform fault, is where two plates move past each other without direct collision.
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Why are volcanoes not found along conservative plate margins?
What is the lithosphere?
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The rigid layer formed by the crust and upper mantle.
What is the lithosphere?
Describe the physical processes that happen at a destructive plate margin.
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When oceanic and continental plates collide the denser oceanic plate subducts the continental plate and enters the mantle where it melts. Magma can rise through the lithosphere and erupt as lava through volcanoes. As the oceanic plate subducts, it gets stuck due to friction. Pressure builds up until it is released as an earthquake.
Describe the physical processes that happen at a destructive plate margin.
Give one reason why the incidence of natural hazards is increasing.
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Reasons include:
- Climate change
- Deforestation
- Urbanisation
- Population increase
Give one reason why the incidence of natural hazards is increasing.
