Eruptions
Description: Volcanic Eruption
Image copyright: http://classroomclipart.com
Bibliography
National Geographic. National Geographic. 1996-2007.
2007
classroom clipart. Classroom clipart. 2004-2007
2007
Dr. Ken wohletz. Askforkids
2008
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Sixth Grade Volcano Web Page
Eruptions Description: Volcanic Eruption Image copyright: http://classroomclipart.com |
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Eruption begins when magma, the molten from deep inside the earth’s crust rises. Dissolved gases in the magma decide whether it will be explosive or non-explosive. Low amounts of gases lead to non- explosive eruption, higher amounts of gases lead to explosive eruptions. Anyone who has shaken a soda bottle and then opened it has seen similar phenomenon the dissolved gases come out of solution and the liquid erupts. Sometimes volcanoes erupt explosively pouring out hot ash, gas, and chunks of rocks. Other eruptions lava oozes the volcanoes vent. Opening and flows down its side. The height of an eruption can be measured directly in observed eruptions. During the eruption volcano flowing lava and ash forming a large cone. This cone is called a volcano.
Bibliography National Geographic. National Geographic. 1996-2007. 2007 classroom clipart. Classroom clipart. 2004-2007 2007 Dr. Ken wohletz. Askforkids 2008
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