Volcanoes

Question 1

Where Is a volcano formed

Answer 1

A volcano is usually formed at destructive plate boundaries and hotspots

Question 2

What happens before an eruption

Answer 2

Gases build up in the magma chamber

Question 3

Life cycle

Answer 3

Active,dormant,extinct

Question 4

Active

Answer 4

Has erupted in past 100 years

Question 5

Dormant

Answer 5

Has not erupted in 100 years but could erupt again

Question 6

Extinct

Answer 6

Has not erupted in historical times

Question 7

What scale do they use to measure a volcano

Answer 7

(VEI) volcanic explosivity index

Question 8

What is an example

Answer 8

Mount st. Helens 1980 Washington state USA

Question 9

What happens at a volcano

Answer 9

When the pressure becomes too great the volcano erupts through a pipe called a vent, ejecting hot lava, gases, ash and rock fragments. These are known as pyroclasts.

Question 10

When a top gets blown of a volcano what is the name of the whole it leaves

Answer 10

Crater

Question 11

Describe a volcanic eruption (key words)

Answer 11

Lava, magma, magma chambers, crater, vent, destructive plate boundary, hot spot, ash, pyroclasts, Mount St hellen