Volcanoes: Structure and Activity Quiz

A geological formation where molten rock, gases, and ash are ejected from the Earth's interior.

A pool of molten rock beneath the Earth's crust.

The main opening on a volcano's surface through which lava, gas, and ash erupt.

A tube-like structure connecting the magma chamber to the crater, allowing magma to rise.

A smaller opening on a volcano's side that releases magma.

The funnel-shaped or bowl-shaped opening at the top of a volcano where eruptions occur.

Molten rock that flows onto the Earth's surface during a volcanic eruption.

A mixture of rock fragments, minerals, glass particles, and gases expelled during a volcanic eruption.

The ability of a fluid to resist flow.

A flow of hot, molten rock (lava) moving downslope or away from an eruption vent.

A rough, jagged lava flow with sharp edges, posing a significant hazard.

A smooth-surfaced lava flow that moves more slowly than aa lava flow.

A mixture of hot gas, ash, and rock fragments that travels rapidly downslope at high speeds.

A sudden, powerful explosion of volcanic material that can devastate large areas.

Gases released from a volcano, including water vapor, carbon dioxide, and sulfur dioxide.

A fast-moving flow of water, mud, and debris triggered by volcanic activity.