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Volcano PowerPoint
By: Brody Snook
What is a volcano?
a mountain or hill, typically conical, having
a crater or vent through which lava, rock
fragments, hot vapor, and gas are being or
have been erupted from the earth's crust.
Why do volcanoes erupt
Volcanoes erupt because of density and
pressure. The lower density of the magma
relative to the surrounding rocks causes it
to rise (like air bubbles in syrup). It will rise
to the surface or to a depth that is
determined by the density of the magma
and the weight of the rocks above it.
What happens when a volcano erupts
An eruption begins when pressure on
magma chamber forces magma up through
the conduit and out the volcanos vents,
when the magma chamber has been
completely filled it blows out of the
volcanos vent.
What causes a volcano

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Volcano powerpoint #2

  • 2. What is a volcano? a mountain or hill, typically conical, having a crater or vent through which lava, rock fragments, hot vapor, and gas are being or have been erupted from the earth's crust.
  • 3. Why do volcanoes erupt Volcanoes erupt because of density and pressure. The lower density of the magma relative to the surrounding rocks causes it to rise (like air bubbles in syrup). It will rise to the surface or to a depth that is determined by the density of the magma and the weight of the rocks above it.
  • 4. What happens when a volcano erupts An eruption begins when pressure on magma chamber forces magma up through the conduit and out the volcanos vents, when the magma chamber has been completely filled it blows out of the volcanos vent.
  • 5. What causes a volcano

Editor's Notes

  1. What is a volcano? a mountain or hill, typically conical, having a crater or vent through which lava, rock fragments, hot vapor, and gas are being or have been erupted from the earth's crust.