Lesson 9 Volcanic Eruptions

LESSON #9:

VOLCANIC ERUPTIONS

Multiple Choice

In a volcano, magma collects in a packet called ________.

• Magma flow

• Magma chamber

• Magma pipe

• Hot spot

Multiple Choice

Refers to the movement of lava as it flows out from the vent.

• Lava flow

• Magma flow

• Pyroclastic flow

Multiple Choice

What part of a volcano is number 3?

• Vent

• side vent

• crater

• Magma chamber

• Pipe

Multiple Choice

What factor(s) determine(s) whether an eruption will be explosive?

• The amount of gases in the magma
• The amount of silica in the magma
• The amount of gas and silica in the magma
• None of these affect the explosiveness of the volcano

Multiple Choice

Rank the volcanic stages from MOST likely to LEAST likely to erupt.

• active, dormant, extinct

• extinct, dormant, active

• dormant, extinct, active

• dormant, active, extinct