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MMS Science 8-Plate Tectonics

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Question
Answer
One of the six or seven great divisions of land on the globe.   Continent  
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Wegener's hypothesis that all continents were once connected in a single large landmass that broke apart about 200 million years ago and drifted slowly to their current positions.   Continental Drift  
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A large, ancient landmass that was composed of all the continents joined together.   Pangaea  
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The portion of Earth's crust that lies beneath ocean waters.   Seafloor  
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Hess's theory that new seafloor is formed when magma is forced upward toward the surface at a mid-ocean ridge.   Seafloor Spreading  
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To come together.   Converge  
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To move apart.   Diverge  
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To convert or change.   Transform  
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A theory that Earth's crust and upper mantle are broken into plates that float and move around on a plastic-like layer of the mantle.   Plate Tectonics  
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A large section of Earth's oceanic or continental crust and rigid upper mantle that moves around on the asthenosphere.   Plate  
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A rigid layer of Earth about 100 km thick, made of the crust and a part of the upper mantle.   Lithosphere  
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A plastic-like layer of Earth on which the lithospheric plates float and move around.   Asthenosphere  
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The current in Earth's mantle that transfers heat in Earth's interior and is the driving force for plate tectonics.   Convection Current  
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