The Challenge of Natural Hazards. Key Words.

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  • The Challenge of Natural Hazards. Key Words.
    • Natural Hazards.
      • Hazard Risk.
        • The chance that a natural hazard may take place.
      • Natural Harzard.
        • A natural event that threatens people or has the potential damage, destruction or death.
    • Tectonic Hazards.
      • Conservative Plate Margin.
        • Two tectonic plates slide past each other.
      • Constructive Plate Margin.
        • Rising magma adds new material to plates that arediverging or moving apart.
      • Destructive Plate Margin.
        • Where two plates are converging or coming together andoceanic plate is subducted.
      • Earthquake.
        • A sudden or violent movement within the Earth’s crust followed by a series of shocks.
      • Immediate Responses.
        • The reaction of people as the disaster happens and in the immediate aftermath.
      • Long-Term Responses.
        • Later reactions that occur in the weeks, months and years after the event.
    • Weather Hazards.
      • Economic Impact.
        • The effect of an event on the wealth of an area or community.
      • EnvironmentalImpact.
        • The effect of an event on the landscape and ecology of the surrounding area.
      • Extreme Weather.
        • This is when a weather event is significantly different from the average
      • Global Atmospheric Circulation.
        • The worldwide system of winds, which transports heat from tropical to polar latitudes.
      • Management Strategies.
        • Techniques of controlling, responding to, or dealing with an event.
    • Climate Change.
      • Adaptation
        • Actions taken to adjust to natural events such as climate change.
      • Climate Change.
        • A long-term change in the earth's climate,
      • Mitigation.
        • Action taken to reduce or eliminate the long-term risk to human life and property from natural hazards.
      • Orbital Changes.
        • Changes in the pathway of the Earth around the Sun.
      • Quaternary Period.
        • The period of geological time from about 2.6 million years ago to the present.
  • Monitoring.
    • Recording physical changes to help forecast when and where a natural hazard might strike
  • Plate Margin.
    • The margin or boundary between two tectonic plates.
  • Planning.
    • Actions taken to enable communities to respond to, and recover from, natural disasters.
  • Prediction.
    • Attempts to forecast when and where a natural hazard will strike, based on current knowledge.
  • Primary Effects.
    • Impacts caused directly by a disaster.
  • Protection.
    • Actions taken before a hazard strikes to reduce its impact.
  • Secondary effects
    • Indirect impacts of a natural event.
  • Tectonic Hazard.
    • A natural hazard caused by movement of tectonic plates.
  • Tectonic Plate.
    • A rigid segment of the Earth’s crust which can ‘float’ across the heavier, semimolten rock below
  • Volcano.
    • An opening in the Earth’s crust from which lava, ash and gases erupt.
  • Social Impact.
    • The effect of an event on the lives of people or community
  • Tropical Storm (Hurricane, Cyclone, Typhoon).
    • An area of low pressure with winds moving in a spiral around the calm central point called the eye of the storm. Winds are powerful and rainfall is heavy.

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