What Makes a Volcano Erupt?


When pressurized molten rock combines with heated gases, volcanoes erupt. The magma being less dense than the solid rock surrounding it produces eruption. You can find more information here: http://www.umich.edu/˜gs265/society/volcanoes.htm
Q&A Related to "What Makes a Volcano Erupt?"
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the volcano erupts from the earth. when it hits 200 degrees celsius, it will erupt..and volcanoes can erupt ice at -300 degrees celsius
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1 Additional Answer
Ask.com Answer for: what makes a volcano erupt
Several factors trigger volcanic eruptions, including the buoyancy of magma, a build-up of pressure from the gases in the magma and an injection of new magma into a full magma chamber.
When a part of the earth's upper mantle or lower crust melts, magma forms. A volcano is essentially an opening or a vent through which this magma and the dissolved gases it contains are discharged.
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