Volcanic Eruptions and Lava Types
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Volcanic Eruptions and Lava Types

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Questions and Answers

What type of volcanic activity is associated with a cone-shaped mountain or hill created by molten material?

  • Effusive eruption (correct)
  • Explosive eruption
  • Strombolian eruption
  • Phreatomagmatic eruption
  • Which of the following is NOT a part of a volcano's structure?

  • Vent
  • Magma chamber
  • Conduit
  • Sill (correct)
  • What is the term for the molten rock beneath the Earth's surface?

  • Lava
  • Pyroclastic
  • Ash
  • Magma (correct)
  • What is the opening in the Earth's surface through which volcanic materials escape?

    <p>Vent</p> Signup and view all the answers

    What type of volcano is formed by an accumulation of volcanic debris?

    <p>Parasitic cone</p> Signup and view all the answers

    Which of the following is a more or less vertical, sheet-like magma body that cuts through older rocks or sediments?

    <p>Dike or Dyke</p> Signup and view all the answers

    Which of the following statements about magma and lava is correct?

    <p>Magma is the hot molten rock coming from the mantle, while lava is the molten rock that erupts from a volcano.</p> Signup and view all the answers

    What is the vent of a volcano?

    <p>The entrance of a volcano, where lava and volcanic ash are ejected.</p> Signup and view all the answers

    Which of the following best describes an active volcano?

    <p>A volcano that is erupting or has erupted recently and is expected to erupt again in the near future.</p> Signup and view all the answers

    What is a dormant volcano?

    <p>A quiet volcano that is not active now, but may become active again in the future.</p> Signup and view all the answers

    Which of the following best describes an extinct volcano?

    <p>A volcano that is at the end of its life and is no longer able to erupt.</p> Signup and view all the answers

    Which of the following is a type of volcano based on its shape?

    <p>Cinder cone volcano</p> Signup and view all the answers

    What type of volcano is Paricutin in Mexico?

    <p>Composite volcano</p> Signup and view all the answers

    What is the maximum height of a composite volcano?

    <p>3000 meters</p> Signup and view all the answers

    What is the primary composition of the lava in a composite volcano?

    <p>Granitic</p> Signup and view all the answers

    What happens during a quiet eruption of a composite volcano?

    <p>Lava flows cover the sides of the cone</p> Signup and view all the answers

    What is the main difference between an explosive and an effusive/nonexplosive eruption?

    <p>The amount of pressure released</p> Signup and view all the answers

    Why does the lava fragment burst into the air and fall around the vent of a volcano?

    <p>Because there is only one vent for the magma to escape</p> Signup and view all the answers

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