Volcanoes part 2

Question 1

Vent

Answer 1

Hole through which magma forces its way up to the earth’s surface.

Question 2

Fissures

Answer 2

Large cracks through which magma goes out to the earth’s surface.

Question 3

A plateau is formed…

Answer 3

when fissures erupt, it’s wider and flatter.

Question 4

Lava

Answer 4

Magma that has already reached the surface.

Question 5

Tephra

Answer 5

mixture of ash, pumice and dust.

Question 6

Pyroclast

Answer 6

mixture of hot ash, lava and rock fragments that are thrown out of the volcano

Question 7

Volcanic bombs…

Answer 7

are a synonym for pyroclast

Question 8

Pyroclastic flows

Answer 8

boiling clouds of ash and rock which travel at great speeds down the sides of the volcano.

Question 9

The height to which an ash cloud rises is used to measure the force of a volcanic eruption on the…

Answer 9

volcanic explosivity index

Question 10

Pumice

Answer 10

forms when lava is thrown from the volcano and it’s whipped up and becomes full of air bubbles, when it cools the bubbles get trapped in the rock.

Question 11

Lahars

Answer 11

mixture of water and rock fragments, they can be triggered by intense rainfall.