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Volcanoes

volcanoes

TermDefinition
volcano a weak spot in the crust where magma comes through the surface
magma a molten mixture of rock forming substances
lava what magma is when it reaches the surface
volcanic ash ash that come from a volcano
crater a circular depression in the ground caused by volcanic activity
lava flow flowing lava
ring of rire a major volcanic belt formed by the many volcanoes that rim the Pacific Ocean
vent the weak point in the earth’s crust where hot magma is able to rise from the magma chamber and reach the surface
pipe a pipe that goes through the earth that allows magma to erupt out of the volcano
element a substance that cannot be broken down into other substances
viscosity the resistance of a liquid to flowing
silica a compound of something that's made out of silicon and oxygen
pahoehoe slow moving, cool lava that has high viscosity
aa fast moving, hot lava that has low viscosity
compound a substance made out of two or more elements that have been chemically combined
subduction when a plate goes downward into another plate
extinct when a volcano is unlikely to erupt again
dormant when a volcano is sleeping
active when a volcano is erupting or showing signs of erupting
cinder cone volcano a volcano that is formed by lava exploding in the air, making ash, cinders, and bombs, which pile up around the vent, forming a steep mountain
shield volcano a volcano that is built by thin layers building up to make a wide, sloping mountain
composite volcano a volcano that is built by alternating with ash, cinders, and bombs
coldera a huge hole left by the collapse of a volcanic mountain
batholith a large body of magma that cooled inside the crust
lava platue thin, runny lava flow out of cracks and travel a long distance before cooling and hardening
sill magma squeezes between layers of rock and hardens
dike magma forces itself across rock and hardens
hot spring water from the mantle that collects in a natural pool
geyser a fountain of water and steam that erupts from the ground
Created by: 1961845308
Popular Earth Science sets

 

 



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