Volcanoes

Question 1

What is the difference between lava and magma?

Answer 1

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

Question 2

What are the three types of volcano(With examples)

Answer 2

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)

Question 3

Name three disadvantages of volcanoes

Answer 3

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

Question 4

Name five advantages of volcanoes

Answer 4

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.

Question 5

Name the parts of a volcano

Answer 5

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

Question 6

Explain how mid ocean ridges occur.

Answer 6

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

Question 7

How is a volcano formed?

Answer 7

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