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Plate Tectonics

Third Nine Weeks

CRUST Earth's outermost layer
MANTLE largest layer of Earth's interior; lies above the outer core
OUTER CORE layer of Earth that lies above the inner core; thought to be made mostly of molten metal
INNER CORE solid, innermost layer of Earth's interior; hottest part of Earth and has the greatest amount of pressure
PLATE TECTONICS Earth's crust & part of the upper mantle are broken into sections
PLATES these sections move on a plastic-like layer of the mantle
LITHOSHPERE plates that are made of the crust & a part of the upper mantle; they are rigid
ASTHENOSPHERE the plastic-like layer below the lithosphere
DIVERGENT BOUNDARY two plates move apart
CONVERGENT BOUNDARY two plates move together
TRANSFORM BOUNDARY two plates slide past one another; they can move in the same direction or opposite directions
CONVECTION CURRENTS this entire cycle of heating, rising, cooling, & sinking; this happens in the mantle
SUBDUCTION ZONE when an oceanic plate converges with a less dense continental plate, the denser oceanic plate sinks under the continental plate
Created by: mgrant