Plate Tectonics and Volcano Formation
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Questions and Answers

What is the primary cause of the formation of volcanoes in the Pacific Ring of Fire?

  • The collision of tectonic plates
  • The transform motion of tectonic plates
  • The convergent motion of tectonic plates (correct)
  • The divergent motion of tectonic plates

    • What percentage of the world's active and dormant volcanoes are found in the Pacific Ring of Fire?

  • 60% (correct)
  • 70%
  • 40%
  • 50%

    • What is the name of the process that forms volcanoes when an oceanic plate is pushed beneath a continental plate?

  • Continental drift
  • Plate tectonics
  • Subduction (correct)
  • Sea-floor spreading

    • What is the name of the largest volcano in the world?

    <p>Mauna Loa</p> Signup and view all the answers

    What is the term for the small volcanoes that form around a main volcano?

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

    How many active volcanoes are found in the Philippines?

    <p>24</p> Signup and view all the answers

    What is the primary reason for magma to rise in a volcanic eruption?

    <p>The expansion of dissolved gases in the magma</p> Signup and view all the answers

    What type of volcanic arc is formed when an oceanic plate meets a continental plate?

    <p>Andean/Volcanic arc</p> Signup and view all the answers

    What is the term for the column of magma in the mantle that rises to the surface, forming a volcano?

    <p>Mantle plume</p> Signup and view all the answers

    What is the term for the large depression formed when a volcano erupts and collapses?

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

    What is the relationship between silica content and viscosity in magma?

    <p>Viscosity is directly proportional to silica content</p> Signup and view all the answers

    What type of volcano is characterized by a near-perfect cone shape?

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

    What type of volcanic activity is characterized by the movement of tectonic plates away from each other?

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

    What is the deadliest component of a volcanic eruption?

    <p>Pyroclastic flows</p> Signup and view all the answers

    What is the term for the underground tube-like structure that connects the magma chamber to the main vent?

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

    What is the name of the famous volcano in Hawaii with a lava dome shape?

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

    What is the process that occurs as magma rises, resulting in eruptions?

    <p>The dissolved gases expand and form bubbles</p> Signup and view all the answers

    What type of volcanic material is characterized by a glass-like surface?

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

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