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Tectonics Key Terms


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Convection
movement caused by hotter liquid rising and cooler material sinking
Lithosphere
the rigid outer part of the earth, consisting of the crust and upper mantle
Mantle
predominantly solid, but behaves like a very viscous liquid
Core
solid and made of iron
Subduction
sideways and downward movement of a more dense crust into the mantle beneath another plate
Melting
when a solid becomes a liquid
Crust
solid shell of the planet
Plate Tectonics
theory that explains the movement of the earths crust and interaction of tectonic plates
Continental Drift
the gradual movement of the continents across the earth's surface over time
Lava
viscous liquid that has erupted from a volcano
Magma
viscous liquid that is under the earth's crust
Continent
any of the world's main continuous expanses of land