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volcanoes

QuestionAnswer
what is the ring of fire? area where tons of volcanoes are located, on the edges of plate boundaries
what is an example of a composite volcano? Mt. St. Helens
what occurs during an eruption? the gasses separate themselves from the surrounding material when pressure is released, creating individual bubbles and these gasses then move in the direction of less pressure
geotherm the deeper we go, the hotter it is
what does the letting out of gas over time do? reduce the amount of eruptions
what is magma? molten/partially molten rock from which igneous rocks form.
what is usually in magma? silicate liquid, carbonate and sulfide melts
what is lava? magma on earth's surface
pyroclastic flow highly destructive, incandescent mass of gas enveloped in volcanic particles
batholith large body of igneous rock formed beneath the earth's surface by solidification of magma
what are the 3 types of volcanoes? shield, composite, cinder
what is the ratio of length to width for a shield volcano? it is very wide volcano but not very tall/long
what is the ratio of height to length for a composite volcano? 1:2
what is the ratio of height to length for a cinder volcano? 1:1
caler indentation at top of mount, like a chimney
viscosity a measure of resistance to flow, or resistance of a fluid to deform under shear stress
rock naturally occurring solid aggregate of minerals
mineral a naturally occurring substance that's solid and inorganic, representable by chemical formula and has an ordered atomic structure
what two type of minerals make granite? feldspar and quartz
what is the makeup of silicate? SIO4
which type of silicate flows easier? island silicate
how are chain silicates made? decrease energy, bonds made-> chain silicates
what are the four types of silicates involved in magma flow? island, double chain, sheet, framework
felsic rocks are enriched with what? silicates, which makes them lighter
What temperatures are mafic and felsic rocks made at? mafic=high, felsic=low
Created by: VaLeRiA!
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