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Third Nine Weeks

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