Plate Margins Flashcards

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Draw a diagram to show the main features of a constructive plate margin.
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An image of a constructive plate margin

A constructive plate margin

Draw a diagram to show the main features of a constructive 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.
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.
What is a rift valley?
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A long, narrow valley lying between two normal geologic faults. Rift valleys usually form where the Earth’s lithosphere has become thin through extension associated with plate-tectonic processes.

What is a rift valley?
Describe the physical processes that happen at constructive plate margin.
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At a constructive plate margin magma rises between two tectonic plates. The plates move away from each other due to ridge push and slab pull. The magma cools to form a new plate. On land rift valleys form such as the East African rift valley. Where two oceanic plates move apart new islands can be formed e.g. Iceland.

Describe the physical processes that happen at constructive plate margin.




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