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sábado, 11 de noviembre de 2017

The volcanoes


What is a volcano?


·         A volcano is  a rupture in the crust of a planetary-mass object, such as Earth, that allows hot lavavolcanic ash, and gases to escape from a magma chamber below the surface.                                                        

How does a volcano erupt?
·         Deep inside Earth, there is a solid body of rock called mantle. When rock from the mantle melts, moves to the surface through the crust, and releases gases, volcanoes erupt. Extremely high temperature and pressure cause the rock to melt and become liquid rock or magma. When a large body of magma has formed, it rises through the denser rock layers towards Earth´s surface. Magma that has reached the surface is called lava.



Which are the volcano´s  eruption consequences?
  • Ash discharged very high into the stratosphere can have negative consequences on the ozone layer.
  • Landscapes and natural sceneries can be destroyed.
  • Ash and mud can mix with rain and melting snow, forming lahars(mudflows flowing at very fast pace).
  • Fires and people and animal death.


Volcano infographic


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