Earth's Crust and Volcanic Eruptions Quiz

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@UnquestionablePortland

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Questions and Answers

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

Lava

Crust

Magma (correct)

Pyroclast

What geological feature is formed when magma solidifies beneath the Earth's surface?

Dyke (correct)

Volcano

Fissure

Crater

Which of the following is not a type of volcano as mentioned in the text?

Composite volcano

Dormant volcano (correct)

Crater volcano

Shield volcano

What is the primary reason for the eruption of a volcano according to the text?

Rubbing of Earth's plates Signup and view all the answers

Which of these is responsible for determining the explosiveness of a volcanic eruption?

The thickness of the magma Signup and view all the answers

What do we call volcanic fragments that are larger than ash but smaller than blocks?

Lapilli Signup and view all the answers

What is the name of the volcano that erupted in Italy in 79 A.D. and buried the city of Pompeii?

Mount Vesuvius Signup and view all the answers

What is the molten rock called when it flows from a volcano during an eruption?

Lava Signup and view all the answers

What causes the melting of rock, creating magma?

Friction of moving plates Signup and view all the answers

Which type of volcano is cone-shaped and built of layers of pyroclasts with hardened lava layers in between?

Strato-volcano Signup and view all the answers

How do geologists usually issue warnings before a volcano erupts?

By monitoring earthquakes Signup and view all the answers

What determines the explosiveness of a volcanic eruption?

Thickness of the magma Signup and view all the answers