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Volcano. By Catherine, Melanie, and Manisha. What is a Volcano?. Volcano is an opening or a vent in the surface of the earth through which magma and gases escape. Magma is molten rock located beneath the surface of the earth. . Why Do Volcanoes Erupt?. Volcanoes erupt

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volcano

Volcano

By Catherine, Melanie, and Manisha

what is a volcano
What is a Volcano?
  • Volcano is an opening or a vent in the surface of the earth through which magma and gases escape.
  • Magma is molten rock located beneath the surface of the earth.
why do volcanoes erupt
Why Do Volcanoes Erupt?

Volcanoes erupt

because of changes in

  • Temperature
  • Viscosity
  • Dissolved Gases in Magma
  • Pressure
how are rocks formed
How Are Rocks Formed?
  • Sedimentary rocks – Small pieces of rocks are deposited by wind or water and compressed.
  • Igneous rocks - Magma trapped in reservoirs cools down.
  • Metamorphic rocks - Sedimentary and igneous rocks under high pressure and build up of heat change into metamorphic rocks.
resources
Resources
  • http://vulcan.wr.usgs.gov/Outreach/AboutVolcanoes/what_is_a_volcano.html
  • http://www.fi.edu/fellows/fellow1/oct98/create/sediment.htm
  • http://www.educypedia.be/education/geologyanimations.htm
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