Extreme Natural Events

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Extreme Natural Events
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Focusing questions

• What are extreme natural events and where and how
  often do they occur?
• What are the natural and cultural features of the
  environments that make them vulnerable to
  earthquakes?
• What natural processes are involved in the
  formation of earthquakes?
• What effects do earthquakes have on land and the
  people?
• How have different groups of people responded to
  the effects of earthquakes?

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Brainstorm

• How many extreme natural events can you think of?
• How may these be categorised?
• Use the A-Z template in teams.

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Video clips
http//www.youtube.com/watch?vl_8hOai9hGQ
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Key Terms

• Extreme natural event An abnormally severe
  natural event, like a storm, flood, tropical
  cyclone, landslide or tsunami.
• Natural event Any event that is caused by
  natural processes.
• Natural disaster An extreme natural event that
  affects people.
• Natural hazard an extreme natural event which
  could threaten people.

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Natural processes

• A natural event is the result of a series of
  related actions known as processes. Rainfall
  processes for example, include evaporation,
  condensation and precipitation.

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• Copy the Venn diagram below and give a name to
  the data found at the intersection of the
  diagram.
• Add the following examples to the appropriate
  places
• Farms, towns, mines
• A volcanic eruption on an uninhabited island
• A volcanic eruption in Auckland

Human use of an area

• Extreme Natural
• Event

Intersection
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Classification of Extreme natural events

1. Duration of the event. Some may last for years
   (eg. coastal erosion) while others are over in a
   few seconds. (eg. An earthquake)
2. Frequency of the event. Some may occur many times
   a year (eg. Storms) while others may occur only
   once every 500 years (eg. earthquake)

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Classification of Extreme natural events ctd..

• 3. Damage caused. Some extreme natural events
  cause a lot of damage and death (eg. a cyclone)
  while others cause very little damage are
  rarely life-threatening (eg. A frost)
• 4. The area affected. Some extreme natural events
  affect huge areas (eg. A tsunami) while others
  may affect only a few hectares (eg. hail)

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Scattergraph to show different types of extreme
natural events.

• 3.

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Activities

• Construct a pie graph of the worlds extreme
  natural events.
  

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World pattern of extreme natural events

• Use an atlas to help you complete a world map
  showing the pattern of extreme natural events.
• Complete activity sheet on world patterns.

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Personal Key

• Choose an extreme natural event that you have
  either experienced or studied. Describe your
  thoughts and feelings about this event.

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The reasons why New Zealand is vulnerable to
different types of extreme natural events.
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