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8th grade -Volcano

8th grade - Volcano

QuestionAnswer
Volcano A mountain that forms when molten rock, called magma, is forced to the Earth's surface.
Lava magma that flows onto the Earth's surface
Pyroclastic Material Consists of rock fragments created by explosive volcanic eruptions.
Shield Volcanoes A type of volcano that is built out of layers of lava from repeated nonexplosive eruptions.
Cinder Cone Volcanoes Small volcanic cones made entirely of pyroclastic material from moderately explosive eruptions.
Composite Volcanoes Volcanoes that are formed by explosive eruptions of pyroclastic material followed by quieter outpourings of lava.
Hot Spots Places on the Earth's surface that are directly above columns of rising magma.
Convergent boundary The place where two tectonic plates collide.
Divergent boundary When two tectonic plates separate and move away from each other.
Crater A funnel-shaped pit at the top of the central vent in most volcanoes.
Caldera This forms when a magma chamber that supplies material to a volcano empties and its roof collapses.
Created by: Lacy07 on 2009-02-12



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