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Volcanos

TermDefinition
Volcano a weak spot in the crust where molten material, or magma, comes through the surface.
Lava what magma is called when it reaches the surface
Magma A molten mixture of rock-forming substances, gases, and water from the mantle
Ring of Fire Formed by the many volcanoes that rim the pacific ocean
Hot spot an area where material from deep within the mantle rises and melts forming magma
Shield volcano Gentle sloping mountain formed by repeated lava flows.
Composite Volcano Mountain formed by lava flows alternating with explosive eruptions.
Cinder-cone Volcano Coned-shape mountain formed from ash, cinders, and bombs
sill Slab that forms when magma squeezes between layers of rock
Dike Slab that forms when magma forces itself across rock layer
Batholith mass of rock formed when magma cooled inside the crust
lava plateau High level area formed by repeated lava flowa
extinct Unlikely to erupt again
dormant sleeping (hasn't erupted in a while)
active Erupting or showing signs of erupting in the near future
Element a substance that cannot be broken down into other substances.
Viscosity The resistance of a liquid to flowing
Silica A compound made up of the elements oxygen and silicon
Pahoehoe Fast moving hot lava that has low viscosity
AA Lava that is cooler and slow moving
Compound A substance made up of two or more elements
Magma Chamber Location where lava, tephra, and gases are stored inside a volcano
Crater Bowl-shaped area that forms around a volcano's central vent
Vent An opening on the side or at the top of a volcano for lava to flow out of
Pipe the tube that carries magma to the opening of a volcano
Caldera Large hole formed when a volcano's magma chamber empties and collapses
Hot spring When ground water heated by a near by body of magma rises to the surface and collects in a natural pool
Geysers Type of hot spring that erupts as a fountain of water and steam
Created by: 1964112972
Popular Earth Science sets

 

 



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