Volcanoes Class Work

What is a volcano?

• A type of mountain

• A vent for magma to reach the Earth's surface

• A source of water

• A type of bird

What causes pressure to build up under a volcano?

• Decrease in water turning to steam

• Decrease in pressure

• Cooling of magma

• Expansion of gasses

What is formed at the top of a volcano when rocks break or explode?

• Pyroclastic flow

• Side vent

• Lava

• Crater

What is the name for magma when it leaves the volcano?

• Lava

• Steam

• Ash

• Gasses

What type of volcano slowly and gently oozes lava when it explodes?

• Lava dome volcano

• Cinder cone volcano

• Stratovolcano

• Shield volcano

Which volcano is known for its violent eruptions and pyroclastic flows?

• Mt. Vesuvius

• Mount St. Helens

• Kilauea

• Mauna Loa

What is a pyroclastic flow?

• Formation of a crater at the top of the mountain

• Rocks, lava, and gases flowing down the side of the volcano

• Slow and gentle oozing of lava

• Explosion of fiery rock and ash

Tags

NGSS.MS-ESS3-2

Which ancient Roman city was destroyed by Mt. Vesuvius' pyroclastic flow in 79 AD?

• Rome

• Athens

• Pompeii

• Sparta

What is the speed of pyroclastic flows down the side of the volcano?

• Up to 500 miles per hour

• Up to 1000 miles per hour

• Up to 200 miles per hour

• Up to 100 miles per hour

Tags

NGSS.MS-ESS3-2

What is the main cause of a volcano's eruption?

• Decrease in gasses

• Decrease in water turning to steam

• Cooling of magma

• Pressure build up under the volcano