Extinct volcanoes What are extinct volcanoes?

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Extinct volcanoes What are extinct volcanoes?
✓ These are volcanoes which erupted long time ago and they cannot erupt again.
Note:1. Extinct volcanoes are also called dead volcanoes.

2. Extinct volcanoes are characterized with a caldera or Crater Lake on top.

Qn. Apart from volcanoes, name other physical features that were formed by volcanicity.
✓ Crater lakes
✓ Caldera
✓ Lava dammed lakes
✓ Volcanic plug
✓ Volcanic lakes
✓ Inselbergs
✓ Hot springs
Qn. Give the meaning of the following terms.
✓ A volcano – Is a feature which is formed when the molten rocks solidifies on the earth’s surface.
✓ Magma- Is the molten rocks underground.
✓ A vent- Is a pipe through which molten rocks pass from the earth’s crust to the earth’s surface.
✓ Lava- Is the molten rocks solidified on the earth’s surface after eruption.
Qn. Mention any four importance of volcanicity.
✓ It led to formation of Crater lakes
✓ It led to formation of Calder
✓ It led to formation of Lava dammed lakes
✓ It led to formation of volcanic lakes
✓ It led to formation of Inselbergs
✓ It led to formation of Hot springs
✓ It led to formation of volcanoes
Qn. State two disadvantages of volcanicity
✓ It leads to death of people and animals.
✓ It leads to displacement of people.