Flashcards on Volcanoes

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What is a volcano?

A mountain or hill that has an opening through which molten rock and gases escape from deep within the Earth.

What causes a volcanic eruption?

When molten rock called magma rises to the surface, it can cause an eruption.

What are the three types of volcanoes?

Stratovolcanoes, shield volcanoes, and cinder cone volcanoes.

Where are volcanoes commonly found?

They are commonly found along tectonic plate boundaries.

What is volcanic ash?

Small fragments of volcanic rock and glass produced during explosive eruptions.

How is a volcanic island formed?

When an underwater volcano erupts and builds up lava flows and ash layers to form an island.

What are pyroclastic flows?

Swift-moving currents of hot gas and volcanic matter that flow down the slopes of a volcano.

What is a caldera?

A large depression or crater that forms after the evacuation of a magma chamber beneath a volcano.

What is volcanic lightning?

Electrical discharges that occur during volcanic eruptions.

What is the Ring of Fire?

A major area in the basin of the Pacific Ocean where many earthquakes and volcanic eruptions occur.

What is a volcanic hotspot?

An area in the middle of a tectonic plate where molten rock rises to the surface, forming a volcano.

What is volcanic gas?

Gases released during volcanic eruptions, including water vapor, carbon dioxide, and sulfur dioxide.

What is volcanic tremor?

Continuous vibration or shaking of the ground caused by volcanic activity.

What is a volcanic eruption column?

A column of hot volcanic ash and gas that rises into the atmosphere during an explosive volcanic eruption.

What is the largest volcano in the world?

Mauna Loa in Hawaii.

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Test Your Knowledge


What is a volcano?



What causes a volcanic eruption?



Where are volcanoes commonly found?



What are pyroclastic flows?



What is volcanic gas?



What is a volcanic hotspot?



What is volcanic tremor?



What is a caldera?



What is a volcanic island formed?



What is the Ring of Fire?




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