Classifying Volcanoes

Front

What causes a volcano to erupt?

Back

Pressure builds up in the magma chamber, forcing magma up through the main vent.

Front

This type of volcano is low to the ground and very wide. Their eruptions involve low viscosity lava that flows for many miles.

Back

Shield

Front

Type of volcano that is tall and mountainous. It's height is caused by a highly viscous magma that rises and cools before exiting unto Earth's surface. It's also called a composite volcano.

Back

Stratovolcano

Answer explanation

Mount Fuji in Japan is a stratovolcano.

Front

These volcanoes are usually small and have a large crater. They are made from short-lived eruptions where lava and rock are blown into the air, cool, and fall back down unto the volcano's sides.

Back

Cindercone

Front

This volcano is most likely which type of volcano? Options: Felsic, Composite, Shield, Cinder cone

Back

Shield

Front

Name the volcano type pictured: Options: cinder cone, stratovolcano, shield volcano, caldera

Back

stratovolcano

Front

How do changes in a volcano's surface warn of an impending eruption?

Back

Inflation can show magma close to the surface

Front

What is a steam eruption?

Back

When magma rises toward the surface, causing the groundwater to boil and releasing steam

Front

Rank the volcanic stages from LEAST likely to MOST likely to erupt: active, dormant, extinct.

Back

extinct, dormant, active

Front

How do gas emissions warn us of an upcoming eruption?

Back

The presence of increased CO2 or SO2 can show that magma is close to the surface