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

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

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

How many active volcanoes are found in the Philippines?

<p>24 (C)</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 (D)</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 (B)</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 (A)</p> Signup and view all the answers

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

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

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

<p>Strato volcano (C)</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 (A)</p> Signup and view all the answers

What is the deadliest component of a volcanic eruption?

<p>Pyroclastic flows (B)</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 (D)</p> Signup and view all the answers

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

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

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

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

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