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A volcano just erupted but why did it erupt? ... The main reason for the eruptions from volcanoes is the heat deep within the Earth's mantle. This heat slowly melts rocks to create a slow moving substance called magma. Magma is lighter than the solid rock around it so magma rises and collects in magma chambers.
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library.thinkquest.org/03oct/01550/eruptions.htm
library.thinkquest.org/03oct/01550/eruptions.htm
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Volcanoes occur when the Earth's plates pull apart causing magma to rise to the surface. Volcanoes can also occur over hotspots and where one plate dives beneath another, forcing magma to rise to the surface. Plates diving under one another is known as subduction.
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library.thinkquest.org/10136/volcano/volctq.htm
library.thinkquest.org/10136/volcano/volctq.htm
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Volcano - Wikipedia, the free encyclopedia
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A volcano is an opening, or rupture, in a planet's surface or crust, which allows hot magma, ash and gases to escape from below the surface. The word volcano is derived from the name of Vulcano is...
en.wikipedia.org/wiki/Volcano
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Is it because Global warming? Or some thing else? ... back to the volcanoes they erupt because of built up pressure caused by the movement of techtonic plates. thats i ... Volcanoes erupt because the local pressure of gas and magma is greater than the strength of the crust at that place. Nothing to do with climate change.
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answers.yahoo.com/question/index?qid=20090323223014AAyd...
answers.yahoo.com/question/index?qid=20090323223014AAydaVB
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This interactive exhibit, part of the Exhibits Collection, explores why volcanic eruptions occur. Activities in the exhibit invite visitors to melt rocks, locate famous volcanoes and play the role of a volcanologist.
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www.learner.org/exhibits/volcanoes/
www.learner.org/exhibits/volcanoes/
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