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guildford public

on 16 October 2013

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Transcript of Volcanoes

By Chelti Dane Madamba

Structure of a volcano
The 3 Stages of a volcano
Why does magma rise to the surface?
Lava or Magma?
A volcano is made up of a vent, a pipe, a crater and a cone. The crater is the opening at the top of the volcano. it produces the lava and ash clouds. The vent is used as a passageway for the magma. the magma comes from the magma chamber. It is underneath the volcano. One of the layers is the mantle. in total there are 4 layers covering the magma chamber.
What are volcanoes?
A volcano is a mountain that has an opening called a crater. Below the Earth's Crust, there is a pool of magma, also know as 'molten rock.' When pressure builds up, eruptions happen. Gases and rock shoot up thrhough the vent and crater and fill the air with ash clouds and lava gases. Eruptions can cause lava flows, mudslides, avalanches, falling ash and floods. Volcano eruptions may even knock down an entire forest! An erupting volcano can trigger tsunamis, flash floods, earthquakes and many other natural disasters.
Interesting Facts About Volcanoes
Full transcript