Volcanoes

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

Thick and sticky lava causes larger explosions because _____.

• it forms bubbles

• it creates more gas

• it moves slowly blocking vents

Pyroclastic materials are found in ________ eruptions.

• Explosive

• nonexplosive

True or false: pyroclastic material is formed when magma explodes from a volcano

• True

• False