Volcanic Eruption
Deep within the Earth it is so hot that some rocks slowly melt and become a thick flowing substance called magma. Because it is lighter than the solid rock around it, magma rises and collects in magma chambers. Eventually some of the magma pushes through vents and fissures in the Earth's surface. A volcanic eruption occurs and magma that has erupted is called lava.
from google
There are three main kinds, or shapes, of volcanoes based on the type of materials they erupt.
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Stratovolcanoes build from eruptions of lava and tephra that pile up in layers, or strata, much like layers of cake and frosting. |
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Cinder cones build from erupting lava that breaks into small pieces as it blasts into the air. As the lava pieces fall back to the ground, they cool and harden into cinders that pile up around the volcano's vent.
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Shield volcanoes form from eruptions of flowing lava. The lava spreads out and builds up volcanoes with broad, gently sloping sides. |
Comments (7)
Stanly Martin said
at 5:06 pm on Feb 1, 2010
Benjamin, this does not yet sound like Life Science. Will you be able to make it related to life on Earth?
SeungWooJ said
at 2:53 pm on Feb 4, 2010
nice page
JellyT said
at 2:24 pm on Feb 9, 2010
yep what is relate to life science? is like last year stuff in MS.Cahoon
SeungWooJ said
at 2:43 pm on Feb 9, 2010
nice video, but you should also talk about when it erupted
taeohC said
at 12:57 am on Feb 10, 2010
Nice page, but.... i think this is more related to earth science than life science though....
it's a really nice page though :D
JonC said
at 3:01 pm on Feb 18, 2010
i agree with seungwoo u should tell when it erupted
Stanly Martin said
at 6:25 pm on Mar 13, 2010
OK Benjamin, you didn't go with life science, but your page is OK.
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