Plate boundaries and their movement

Created by: Tomek123
Created on: 16-09-20 11:23

What is a constructive plate boundary?

They are two plates moving apart from each other. They are called constructive plates because when they move apart, magma rises up in the gap- this forms volcanoes and eventually new crust.

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What is a destructive plate boundary?

Where an oceanic and continental plate move towards each other. The heavier, more dense oceanic plate is forced under the continental plate. As it sinks below the continental plate the oceanic plate melts due to friction in the subduction zone.

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What are the risks associated with a destructive plate boundary?

Friction in the subduction zone can cause earthquakes which can then trigger tsunamis, volcanoes can also be formed as the pressure from the melting oceanic plate forces a path through the continental plate

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What is a conservative plate boundary and what are its risks?

Here tectonic plates slide past each other. There is no volcanic activity , though earthquakes can often occur. This is because plates do not pass each other smoothly; friction causes resistance. As pressure builds the crust fractures causing quakes

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What is a collision plate boundary?

These form when two continental plates collide. Neither plate is forced under the other, and so both are forced up and form fold mountains an example is the Himalayas.

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How do tectonic plates move?

Their movement is driven by convection currents in the mantle

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What is a destructive plate boundary?

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What are the risks associated with a destructive plate boundary?

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Card 4

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What is a conservative plate boundary and what are its risks?

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Card 5

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Plate boundaries and their movement