Earth's Crust and Volcanic Eruptions Quiz

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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?

<p>Rubbing of Earth's plates (C)</p> Signup and view all the answers

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

<p>The thickness of the magma (C)</p> Signup and view all the answers

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

<p>Lapilli (B)</p> 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?

<p>Mount Vesuvius (B)</p> Signup and view all the answers

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

<p>Lava (C)</p> Signup and view all the answers

What causes the melting of rock, creating magma?

<p>Friction of moving plates (D)</p> 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?

<p>Strato-volcano (B)</p> Signup and view all the answers

How do geologists usually issue warnings before a volcano erupts?

<p>By monitoring earthquakes (D)</p> Signup and view all the answers

What determines the explosiveness of a volcanic eruption?

<p>Thickness of the magma (B)</p> Signup and view all the answers

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