MMS Science 8-Plate Tectonics
Quiz yourself by thinking what should be in
each of the black spaces below before clicking
on it to display the answer.
Help!
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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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Created by:
rwaters
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