Quiz on Volcanic Eruptions and Earth Changes

What is a volcano?

• An opening on a planet’s surface through which magma is ejected

• A type of mountain formed by erosion

• A large body of water

• A type of earthquake

What is magma called when it reaches the Earth's surface?

• Pumice

• Ash

• Cinder

• Lava

Which part of a volcano is the primary channel for magma to exit?

• Main vent

• Secondary vent

• Magma chamber

• Crater

What type of volcano is typically small and has a steep slope?

• Cinder cone volcano

• Inactive volcano

• Composite cone volcano

• Shield volcano

What is a lahar?

• A type of volcanic gas

• A volcanic ash cloud

• A mixture of water and rock fragments that moves down a volcano

• A type of lava flow

Which of the following is a characteristic of shield volcanoes?

• They have steep slopes

• They are formed from explosive eruptions

• They cover large areas and have a broad dome shape

• They are always inactive

What is the term for the underground location where rocks first break apart during an earthquake?

• Fault line

• Seismic wave

• Focus

• Epicenter

What is the circular formation around the main vent of a volcano called?

• Dike

• Crater

• Magma chamber

• Secondary vent

What type of volcano is formed from alternating layers of lava and pyroclastic debris?

• Inactive volcano

• Composite cone volcano

• Shield volcano

• Cinder cone volcano

What happens to the surface of the Earth during a volcanic eruption?

• It becomes colder

• It is covered with new igneous rock

• It sinks into the ocean

• It becomes a desert