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chapter 3 n

sience

term definishion
volcano a week spot in the crust where magma has come to the surfece
lava is a type of magma that hits the surfece and is more liquidy than magma and cools into obsityon.
magma magma is lava before the sufece hits the magma
ring of fire A major belt of volcanoes that rims the Pacific Ocean.
island arc A string of islands formed by the volcanoes along a deep ocean trench.
hot spot An area where magma from deep within the mantle melts through the crust above it.
magma chamber The pocket beneath a volcano where magma collects.
pipe A long tube through witch magma goes through
vent The opening through which molten rock and gas leave a volcano.
lava flow The area covered by lava as it pours out of a volcano's vent.
crater A bowl-shaped area that forms around a volcano's central opening.
silica A material that is formed from the elements oxygen and silicon; silica is found in magma.
pahoehoe A hot, fast-moving type of lava that hardens to form smooth, rope like coils.
ah A slow-moving type of lava that hardens to form rough chunks; cooler than pahoehoe.
pyroclastic flow The expulsion of ash, cinders, bombs, and gases during an explosive volcanic eruption.
active A volcano that is erupting or has shown signs of erupting in the near future.
dorment A volcano that does not show signs of erupting in the near future, sleeping.
extint A volcano that will not erupt again.
hot spring A pool formed by groundwater that has risen to the surface after being heated by a nearby body of magma.
geyger A fountain of water and steam that builds up pressure underground and erupts at regular intervals.
geothermal energy Energy from water or steam that has been heated by magma.
Created by: McCarthyfen13
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