Volcanoes Video Quiz

This is the name for the chain of volcanoes and earthquakes around the edge of the Pacific Plate.

• The Subduction Zone

• The Ring of Fire

• The Seismic-Tectonic Area

Hot melted rock that forms underground near the subduction zone is called ___.

• lava

• sedimentary rock

• igneous rock

• magma

What is magma called when it reaches the surface of Earth?

• Lava

• viscosity

• toxic gas

Match the volcano to its descriptions?

• Composite

• Erupt loudly - has light grinitic magma

• Cinder Cone

• Erupt quietly - has dark basaltic magma

• Shield

• Has tall steep sides

Match the volcano to its descriptions?

• Shield

• Magma/lava is thinner than composite but thicker than shield

• Cinder Cone

• Is broader and wider than it is tall

• Composite

• Most common type of volcano in the world

What is a volcano?

• A weak spot in Earth’s crust where magma can come to the surface.

• A mix of rocks, minerals, gases, and water from the mantle.

• Hot semifluid rock that becomes solid rock as it cools off.

• A special kind of mountain.

What is a dormant volcano?

• A volcano that has erupted at least once in the last 10,000 years.

• A volcano that hasn’t erupted in the last 10,000 years, but could still erupt.

• A volcano that should never erupt again.

What is an extinct volcano?

• A volcano that has erupted at least once in the last 10,000 years.

• A volcano that hasn’t erupted in the last 10,000 years, but could still erupt.

• A volcano that should never erupt again.

What is a quiet eruption?

• When magma flows easily and erupts quietly with gases bubbling out gently and lava oozing out quietly.

• When trapped gases build up pressure until they explode with incredible force.

What is an explosive eruption?

• When trapped gases build up pressure until they explode with incredible force.

• When magma flows easily and erupts quietly with gases bubbling out gently and lava oozing out quietly.