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What are Natural
Disasters?
The World is always changing.
Natural disasters are changes which are
so great they may cause damage to the
shape of the land or to the lives of people
and other living things.
Great changes happen deep inside the
Earth and on its surface. The changes on
the outer part of the Earth happen
because of different kinds of weather.
What are Natural Disasters?








Volcanic eruption
Earthquake
Cyclone or Hurricane
Avalanche
Flood
Drought
Forest fire or Bushfire
Volcanoes
A volcanic eruption is the spurting out of
gases and hot lava from an opening in the
Earth’s crust.
Pressure from deep inside the Earth
forces ash, gas and molten rock to the
surface.
Earthquake
An earthquake is a violent shaking of the
ground. Sometimes it is so strong that the
ground splits apart.
When parts of the earth, called plates,
move against each other giant shock
waves move upwards towards the surface
causing the earthquake.
Cyclone, Hurricane,
Tornado or Typhoon

All of these (hurricanes, cyclones, typhoons
and tornadoes) are fierce storms with strong
winds that spin around them in a giant circle.
During these storms, trees can be uprooted,
buildings can be destroyed and cars can be
overturned.
Avalanche
An Avalanche is a movement of snow, ice and
rock down a mountainside. Avalanches happen
very suddenly and can move as fast as a racing
car up to 124mph.
Avalanches can be caused by –
snow melting quickly
snow freezing, melting then freezing again
someone skiing
a loud noise or an earth tremor
Flood
A flood is caused by an overflow of water which
covers the land that is usually dry.
Floods are caused by heavy rain or by snow
melting and the rivers burst their banks and
overflow.
Costal floods are caused by high tides, a rise in
sea level, storm waves or tsunami (earthquakes
under the sea).
Drought

A drought is the lack of rain for a long time.
In 1968 a drought began in Africa. Children born
during this year were five years old before rain
fell again.
Forest Fire or Bushfire

Fires can burn out of control in areas of forest or
bush land. Fires are caused by lightning, sparks
of electricity or careless people. Wind may blow a
bushfire to areas where people live.

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Natural Disasters

  • 2. The World is always changing. Natural disasters are changes which are so great they may cause damage to the shape of the land or to the lives of people and other living things. Great changes happen deep inside the Earth and on its surface. The changes on the outer part of the Earth happen because of different kinds of weather.
  • 3. What are Natural Disasters?        Volcanic eruption Earthquake Cyclone or Hurricane Avalanche Flood Drought Forest fire or Bushfire
  • 4. Volcanoes A volcanic eruption is the spurting out of gases and hot lava from an opening in the Earth’s crust. Pressure from deep inside the Earth forces ash, gas and molten rock to the surface.
  • 5. Earthquake An earthquake is a violent shaking of the ground. Sometimes it is so strong that the ground splits apart. When parts of the earth, called plates, move against each other giant shock waves move upwards towards the surface causing the earthquake.
  • 6. Cyclone, Hurricane, Tornado or Typhoon All of these (hurricanes, cyclones, typhoons and tornadoes) are fierce storms with strong winds that spin around them in a giant circle. During these storms, trees can be uprooted, buildings can be destroyed and cars can be overturned.
  • 7. Avalanche An Avalanche is a movement of snow, ice and rock down a mountainside. Avalanches happen very suddenly and can move as fast as a racing car up to 124mph. Avalanches can be caused by – snow melting quickly snow freezing, melting then freezing again someone skiing a loud noise or an earth tremor
  • 8. Flood A flood is caused by an overflow of water which covers the land that is usually dry. Floods are caused by heavy rain or by snow melting and the rivers burst their banks and overflow. Costal floods are caused by high tides, a rise in sea level, storm waves or tsunami (earthquakes under the sea).
  • 9. Drought A drought is the lack of rain for a long time. In 1968 a drought began in Africa. Children born during this year were five years old before rain fell again.
  • 10. Forest Fire or Bushfire Fires can burn out of control in areas of forest or bush land. Fires are caused by lightning, sparks of electricity or careless people. Wind may blow a bushfire to areas where people live.