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Natural hazards

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  • What's a natural hazard?
    a physical event that has the potential to cause loss of life or injury and damage property and infrastructure.
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  • Name 2 climatic hazards
    droughts, tropical cyclones, floods
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  • Name 2 geological hazards
    earthquakes, volcanic eruptions
  •  15
  • Name 2 ways of categorizing natural hazards.
    Causes, magnitude, speed, duration, frequency
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  • What are tectonic plates?
    a piece of the lithosphere that moves slowly on the asthenosphere.
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  • Name 2 differences between oceanic and continental crust
    .
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  • Name the 3 kinds of boundaries between tectonic plates
    Conservative, constructive, destructive
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  • What's the epicentre of an earthquake?
    the point on the Earth's surface directly above the focus
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  • What's the focus of an earthquake?
    the location under the Earth's surface where an earthquake originates
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  • Why do earthquakes take place?
    They result from the build up and sudden release of tension, usually along a fault line.
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  • What's a volcano?
    a hole or crack (fissure) through which magma erupts onto the surface
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  • Name 2 differences between shield and composite volcanos
    .
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  • What's a tropical Cyclone?
    Large areas of very low pressure with wind speeds of over 119 km h-1
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  • How is a tropical cyclone formed?
    .
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  • True or false? When a tropical cyclone passes over land or a cold ocean current it loses the source of energy and the speed increases.
    False!
  •  10
  • True or false? Cyclones always take girls' names
    False!
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