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Volcanoes Flashcards

(7 cards)

1
Q

What is the difference between lava and magma?

A
  • lava is molten rock that flows on the surface of the earth.
  • magma is melted rock that is under the surface of the earth.
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2
Q

What are the three types of volcano(With examples)

A
  1. Active – live volcano which erupts regularly (Mount Saint Helen’s)
  2. Dormant– Sleeping volcano which hasn’t arrived for a long time, but may again. (Cotopaxi, Peru)
  3. extinct – this volcano has died out, it is very unlikely to erupt again. (Slemish Mt)
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3
Q

Name three disadvantages of volcanoes

A
  1. they can cause destruction to buildings and transport. Flowing lava burns everything in its path.
  2. Ash Clouds cause problems for air-traffic, because it can damage engines. Into thousand 10, asked for a volcano in Iceland cause the biggest air-traffic shut down since World War II.
  3. poisonous gasses come out of volcanoes e.g.C02 from them can I harm people and the environment
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4
Q

Name five advantages of volcanoes

A
  1. tourism: Volcanoes off and attract tourists because they’re off and beautiful and exciting places.
  2. Fertile soil: Sawyer and volcanoes are rich in minerals and I good for growing crops. The land around Mount Vesuvius in Italy is used for farming
  3. energy: the heat from volcanoes can create electricity. This is called geothermal power.
  4. new land: The lava from the volcano can build up to create new land when it cools.
  5. mining: viable minerals, e.g.gold, can be found near volcanoes.
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5
Q

Name the parts of a volcano

A
  • magma chamber.
  • vent pipe.
  • Crater.
  • layers of cool lava that form a cone shape.
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6
Q

Explain how mid ocean ridges occur.

A

Mid ocean ridges occur when plates separate on the ocean floor to form a volcano.

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7
Q

How is a volcano formed?

A

•A volcano forms what a gap develops in the earths crust and lava flows or explodes out.

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