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Vocab Words for Plate Tectonics Unit

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Term
Definition
Mid Ocean Ridges   undersea mountain chain where new ocean floor is produced  
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Sea Floor Spreading   The process by which molten material adds new oceanic crust to the ocean floor  
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Deep Ocean Trench   A deep valley along the ocean floor beneath which oceanic crust slowly sinks toward the mantle  
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Subduction   The process by which oceanic crust sinks beneath a deep ocean trench and back into the mantle at a convergent plate boundary  
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Divergent Boundary   A plate boundary where 2 plates move away from each other  
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Convergent Boundary   A plate boundary where 2 plates move toward each other  
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Transform Boundary   A plate boundary where 2 plates move past each other in opposite directions  
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Plate Tectonics   The theory that pieces of Earth's lithosphere are in constant motion, driven by currents in the mantle  
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