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Science Notes

Volcanoes Notes

TermDefinition
volcano any place where gas, ash, or melted rock come out of the ground
magma melted rock
lava magma that has reached the Earth’s surface
vent the opening of a volcano
pyroclastic materials are hot ash and bits of rock
fissure a giant crack in the Earth’s surface
fissure eruptions happen when lava flows from fissures
lava plateau a thick mostly flattened layer of cooled lava on the surface of the Earth
volcanic crater an opening or depression at the top of a volcano caused by eruptions
magma chamber an expanded area of magma inside of a volcano.
caldera a large basin-shaped depression left after an empty magma chamber collapses
tectonic plates giant sections of lithosphere on earth’s surface
hot spot a location where a mantle plume rises through the asthenosphere
mantle plume a column of extremely hot mantle rock
Ring of Fire a name used to describe the numerous explosive volcanoes that form on convergent plate boundaries surrounding the Pacific Ocean
Created by: dogie
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