Volcanoes Flashcards
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Questions and Answers

Which phrase best describes Osorno?

  • Supervolcano
  • Extinct volcano
  • Dormant volcano (correct)
  • Active volcano
  • What happens as magma rises inside a volcano?

    Pressure decreases.

    How did Old Faithful form?

    It is a geyser that formed due to water heated by magma erupting at Earth's surface.

    Which words identify stages of volcanic activity? (Check all that apply)

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

    Which statements are supported by the information in the image? (Check all that apply)

    <p>Many volcanoes are on the western coasts of North and South America.</p> Signup and view all the answers

    What causes a volcanic eruption?

    <p>Explosions occurring in magma chambers.</p> Signup and view all the answers

    What feature forms at a divergent boundary?

    <p>Rift valley.</p> Signup and view all the answers

    What best describes a volcano erupting at night in Russia?

    <p>Volcano quietly erupts due to low-viscosity magma.</p> Signup and view all the answers

    Which features are created on the exterior of a volcano when it erupts? (Check all that apply)

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

    Which statements describe convergent boundaries? (Check all that apply)

    <p>Subduction occurs.</p> Signup and view all the answers

    What phrase describes a volcano that is not expected to erupt again?

    <p>Extinct volcano.</p> Signup and view all the answers

    What best describes a quiet eruption caused by low-viscosity magma?

    <p>This is a quiet eruption caused by low-viscosity magma.</p> Signup and view all the answers

    Study Notes

    Volcanoes Overview

    • Osorno is categorized as a dormant volcano, indicating it has not erupted in a long time.
    • As magma rises within a volcano, the pressure decreases, which can lead to eruptions.

    Geysers

    • Old Faithful is a geyser formed by water heated by magma, erupting at the Earth's surface periodically.

    Stages of Volcanic Activity

    • Three classifications of volcanic activity are:
      • Active
      • Dormant
      • Extinct

    Geographical Distribution

    • Numerous volcanoes are situated on the eastern coast of Asia.
    • Some volcanoes are located in the ocean's midsection.
    • Many volcanoes are found along the western coasts of North and South America.

    Eruptions

    • Volcanic eruptions generally result from explosions occurring in magma chambers.
    • An eruption can be characterized as quiet when produced by low-viscosity magma, allowing lava to flow gently down the mountainside.

    Geological Features

    • A rift valley is a distinctive feature created at divergent boundaries.
    • When a volcano erupts, it can create:
      • Craters
      • Lava flows

    Tectonic Boundaries

    • Convergent boundaries are defined by:
      • The occurrence of subduction
      • The formation of island arcs in the ocean
      • The development of volcanic mountains on land

    Extinct Volcanoes

    • An extinct volcano is one that is unlikely to erupt again, marking a significant point in volcanic classifications.

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    Description

    Test your knowledge of volcanoes with these flashcards. Each card presents key concepts such as the characteristics of specific volcanoes, processes involved in magma movement, and the formation of geological features like geysers. Perfect for students of Earth sciences and geology.

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