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The Life of a Volcano

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  • How many active volcanoes are in the world?
    1,900
  • What is the ring of tectonic plates called?
    The Ring of Fire
  • Can a volcano cause mudflows? Yes or No?
    Yes
  • How long can it take lava to build under the earth?
    millions of years
  • What does ACTIVE mean?
    no signs of movement, but likely to erupt again
  • How hot can lava get?
    2,000 degrees
  • What allows the earth to move?
    tectonic plates
  • How high can Hawaiian eruptions reach?
    a thousand feet
  • What is underneath the surface of planet Earth?
    magma and gas and tectonic plates
  • Eruptions release what 3 things?
    lava, gas, and ash
  • What does DORMANT mean?
    no signs of life, no big risk of eruption
  • The Plinian eruption is the most violent. True or False
    true
  • How long can a Hawaiian eruption last?
    hours or weeks
  • What does ash and gases do to humans?
    Causes breathing problems
  • How many people have died in the last 300 years from volcanic eruptions?
    260,000
  • What does EXTINCT mean?
    wont ever erupt again
  • Which eruption can cause rock and lava to travel faster than 350 miles per second?
    Vulcanian
  • The hotter the magma, the less chance it will explode. True of False?
    true
  • If crystals are near the fracture, the eruption is not violent. True or False?
    False
  • Which eruption is the least dangerous?
    Stombolian
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