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ELL Earth Sci 2&4

Earth's Interior / Plate Tectonics

TermDefinition
gravity the force of attraction that exists between all matter in the universe
crust the thin outermost zone of the earth
oceanic crust crust beneath oceans (5-10 km thick)
continental crust crust making up continents (15-80 km thick)
mantle thickest zone of the earth (2900 km thick) found just below the crust
core center zone of the earth
outer core dense, liquid zone found below the mantle (2250 km thick)
inner core dense, solid zone found beneath outer core (1228 km radius)
lithosphere outermost part of the mantle, which is cool and brittle
asthenosphere layer of the mantle beneath the lithosphere consisting of solid rock that is hot and flows
law of gravity the force of attraction between any 2 objects depends upon their mass and the distance between them
convection current cyclic flow of rock in the mantle created by sinking cool, heavy rock and rising heated rock
pangaea ancient land continent of the Earth
panthalassa ancient sea of the Earth
continental drift movement of continental plates from one another
seafloor spreading movement of the seafloor in opposite directions due to the formation of new rock
Mid-Atlantic Ridge mountain range in the center of the Atlantic Ocean with a narrow valley down the center where new rock is formed
plate tectonics theory that lithosphere floats on top of asthenosphere and is moved by convection currents
divergent boundaries two plates moving away from each other
convergent boundaries two plates move toward each other and collide
transform boundaries two plates grind past each other
Created by: Jesse Wayland
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