Unit 4 Ch. 11 Volcanoes Test Review

Front

What is a lahar?

Back

A type of volcanic mudflow or debris flow.

Front

What type of volcano typically throws ash or scoria into the air during an eruption?

Back

Cinder cone.

Front

What type of rock is formed from lava that cools and solidifies on the Earth's surface?

Back

Extrusive rock.

Front

Name the volcano type that is characterized by steep slopes and explosive eruptions.

Back

Composite/ stratovolcano.

Front

What geological process created Mt. St Helens and Mt. Rainier?

Back

Subduction of the Juan de Fuca plate under the North American plate.

Front

What is the primary difference between a shield volcano and a cinder cone?

Back

Shield volcanoes have broad, gentle slopes and are built from low-viscosity lava, while cinder cones are steep and formed from volcanic debris.

Front

What is the term for molten rock beneath the Earth's surface?

Back

Magma.

Front

What is the term for molten rock that has erupted onto the Earth's surface?

Back

Lava.

Front

What type of boundary is associated with the formation of volcanoes?

Back

Convergent boundaries, divergent boundaries, and hotspot locations.

Front

What is a volcanic eruption?

Back

The release of gas, ash, and molten rock from a volcano.