domingo, 26 de septiembre de 2010

Vocabulary#14 

Hot spot:A very hot part of the mantle, where magma can melt through a plate moving above it.


Vent:A central opening in a volcanic area through which magma may escape.


Lava:Magma that reaches Earth`s surface and flows out of a vent.


Crater:A cuplike hollow that forms at the top of a volcano around the vent.
S:When a volcano collapses it form a crater.

Cinder-cone volcano:A steep-sided cone that forms from explosive eruptions of hot rocks,ranging from particles to boulders.


Shield volcano:A wide ,gently sloped cone that forms from flows of lava.


Composite volcano:A cone formed from explosive eruptions of hot rocks followed by a flow of lava,over and over.


Geothermal energy:Heat from below Earth`s surface.

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