Volcanoes

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Volcanoes

• This is a power-point on volcanoes.
• By Eve-Marie Cook

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Contents

• What is a volcano?
• How do they work?
• Where are there volcanoes ?
• How many people have died?

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What is a volcano?

• A volcano is a mountain or hill, typically cone
  shaped, having a crater or vent where lava, rock
  fragments, hot vapour, and gas are or have been
  erupted from the earth's crust.

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How do they work?

• The Earth's crust is made up of huge slabs called
  plates, which fit together like a jigsaw puzzle.
  These plates sometimes move. The friction causes
  earthquakes and volcanic eruptions near the edges
  of the plates. The theory that explains this
  process is called plate tectonics.

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Where are there volcanoes?
The red dots represent volcanoes. As you can see
most volcanoes are along the coastline or in the
sea.
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How many people have died?

• About 200,000 have lost their lives by volcanic
  eruptions over the last 500 years. One
  devastating eruption was in the Carrabin where
  about 30,000 people died.

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Volcanoes
Thank you!!!
Volcanoes
Volcanoes
Volcanoes