Hazards and Structure of the Earth Flashcards

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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 name of the upper portion of the mantle?
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The asthenosphere

What is the name of the upper portion of the mantle?
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?
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.
What is a natural hazard?
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A natural hazard is a natural event such as an earthquake, volcanic eruption, tropical storm or flood that has the potential to cause death and damage.

What is a natural hazard?




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