Lesson 3 Types Of Volcanoes
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Lesson 3 Types Of Volcanoes

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Lesson 3 Types Of Volcanoes Presentation Transcript

  • 1. Types of Volcano Starter- Dominoes.
  • 2. Active volcano – liable to erupt.
  • 3. Dormant (sleeping) volcano – a volcano which has not erupted for many years
  • 4. Extinct volcano – a volcano which has not erupted for many thousands or millions of years
  • 5. Types of Volcano
    • Composite Volcano
    • Shield Volcano
  • 6. Shield Volcano
    • Occur at Constructive Plate Boundaries.
    • Runny Lava that flows along way from the main vent.
    • Gives the volcano gentle sides.
    • Shield volcanoes almost never erupt violently due to the lava running free (no rocks).
  • 7. Composite Volcanoes.
    • Occur at destructive plate boundaries.
    • Viscous (thick lava)
    • The lava cannot flow far from the vent.
    • Makes the volcano steep sided.
    • Violent eruptions due to rapidly hardening rock which blocks vents and allows the pressure to build.
  • 8. So why do people live near them?
    • Watch the following movie about why people live near volcanoes.
    • Now we have seen the video make a list of the advantages of living near a volcano.
  • 9. 1. How can a Pyroclastic flow cause damage? 4. What might happen to Planes? 6. What impact would a mud flow have? 2. How would trees be effected? 3. What might happen to the sun? 7. What damage could a lava flow do? 8. What would cause roofs to collapse? 9. What could suffocate you? 5. What might happen to crops?