Ch. 5 Vocab

Front

Weak spot in crust where magma surfaces

Back

volcano

Front

Major volcano belt around the Pacific Ocean

Back

Ring of Fire

Front

String of islands formed by volcanoes along a deep-ocean trench

Back

island arc

Front

Area where magma from the mantle melts through the crust

Back

hot spot

Front

Expulsion of ash, cinders, bombs, and gases during an explosive volcanic eruption

Back

pyroclastic flow

Front

A volcano that is not currently active but may become active in the future.

Back

dormant

Front

A volcano that is no longer active and unlikely to erupt again.

Back

extinct

Front

A fountain of water and steam that erupts at intervals

Back

geyser

Front

Molten mixture of rock-forming substances and gases from the mantle, beneath Earth's surface.

Back

magma

Front

Liquid magma that reaches the Earth's surface

Back

lava