Volcanoes

A ________ is any place where gases and magma come out of the ground.

• vent

• crater

• volcano

The area under a volcano that holds magma.

• magma chamber

• lava pool

• magma cauldron

What is the difference between magma and lava?

• lava is cooler than magma

• magma is inside the earth, lava is outside the earth

• lava is inside the earth, magma is outside the earth

• there is no difference

Magma escapes from the volcano through the openings in the earth's crust called _____.

• craters

• throat

• conduit

• vents

The most common type of volcanic eruption is ______.

• explosive

• nonexplosive

True or False: Nonexplosive eruptions release large amounts of lava.

• True

• False

True or False: All volcanic eruptions impact the earth's climate.

• True

• False

The main factor affecting a volcanic eruption is ____.

• Temperature of the magma

• location of the volcano

• what magma is made of

• how tall the volcano is

When magma has more water in it, a violent is explosion is _____ likely.

• more

• less

True or false: Magma that contains a lot of silica is more thin and runny.

• True

• False