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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

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Volcano l.jpg

Volcano

By Catherine, Melanie, and Manisha


What is a volcano l.jpg

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 l.jpg

Why Do Volcanoes Erupt?

Volcanoes erupt

because of changes in

  • Temperature

  • Viscosity

  • Dissolved Gases in Magma

  • Pressure


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Volcano Erupting


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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.


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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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