Plate Margins Flashcards

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Identify the two types of tectonic crust.
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Oceanic and continental crust

Identify the two types of tectonic crust.
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?
What is the lithosphere?
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The rigid layer formed by the crust and upper mantle.

What is the lithosphere?
What is the structure of the Earth?
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From the centre:

  • Inner core
  • Outer core
  • Mantle
  • Crust
What is the structure of the Earth?
What factors affect hazard risk?
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Factors include:

  • An increase in the number of people vulnerable to the natural hazard (e.g. population growth & increased population density close to hazard-prone areas)
  • An increase in the frequency and magnitude of the natural hazard
  • A decrease in the number of people capable of coping with the natural hazard
What factors affect hazard risk?




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