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Earth's Structure

Review for Texas 6th grade science

TermDefinition
tectonic plate a piece of the lithosphere that moves due to convection currents underneath
convection current a circular flow in material due to heating and cooling; causes the plate pieces to move
volcano a location on the crust where gas and lava escape from the mantle
earthquake shaking due to release of energy; usually occurs at plate boundaries
colliding pushing together
ocean trench a valley formed on the ocean side of an ocean-continental collision
ocean basin crust under the ocean formed by plates pulling away from each other
mid-ocean ridge a build up of new crust where plates pull away from each other
folded mountain a mountain formed where two continental plates collide
rift valley a depression in the Earth caused where two continental plates pull away from each other
fault line the line along a boundary where plates slide past each other
crust the solid, outermost layer of the Earth
mantle the semi-solid layer of the Earth below the crust
inner core the solid, innermost layer of the Earth, mostly made of iron
outer core the only liquid layer of the Earth, it surrounds the inner core, made of nickel and iron
lithosphere the crust plus the uppermost, mostly solid, part of the mantle
asthenosphere the part of the mantle directly below the lithosphere, location of the convection currents that move the tectonic plates
landform a geological feature such as a mountain
continental crust less dense portions of the Earth's crust that are land
oceanic crust more dense portions of the Earth's crust that are found under oceans
density the amount of matter in a given space - D = m/v
crust outermost layer of the Earth, thinnest, layer we live on
plate boundary place where two tectonic plates meet; can push together, pull away from each other or slide past each other
chemical layers Earth's layers arrange by the type of matter
physical layers Earth's layers arranged by state of matter
Created by: bwilliamsscience
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