Volcanism and Volcanic Rocks Quiz
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Questions and Answers

Which type of rocks are solidified from lava on the Earth's surface?

  • Metamorphic rocks
  • Extrusive rocks (correct)
  • Plutonic rocks
  • Sedimentary rocks

    • What type of volcanic eruption can produce broad plateaus?

  • Fissure eruptions (correct)
  • Cinder cone eruptions
  • Dome eruptions
  • Ash eruptions

    • Which type of magma composition is less commonly associated with volcanic eruptions?

  • Intermediate
  • Ultramafic
  • Mafic
  • Felsic (correct)

    • What is the most abundant volcanic gas released during eruptions?

    <p>Water vapor (H2O)</p> Signup and view all the answers

    In addition to water vapor, carbon dioxide, and sulfur dioxide, which gas is also considered an important volcanic gas?

    <p>Hydrogen sulfide (H2S)</p> Signup and view all the answers

    What type of lava flow is characterized by a smooth, 'ropey' surface?

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

    What is the term for large, streamlined masses of lava that are ejected as liquids and solidify in the air?

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

    What is the most common type of lava erupted on Earth, with over 90% being this type?

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

    Which volcanic flow type is extremely dangerous, consisting of hot ash and rock fragments infused with expanding volcanic gases?

    <p>Nuée ardente flows</p> Signup and view all the answers

    What is the term for a mudflow that results from pyroclastic materials saturated with water moving downhill?

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

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