hot spot: a very hot part of the mantle, where magma can melt throught a plate moving above it.
vent: a central opening in the volcanic area throught wich magma may scape.
lava: magma that reaches Earth surface and flows out of a vent.
crater: a cuplike hollow that forms at the top of a volcano around the vent.
geothermal energy: heat from below Earth surface.
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 explosed eruption of hot rocks followed by a flow of lava, over and over.
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