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12 Cards in this Set
- Front
- Back
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TRANSFORM FAULT
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A boundary where planes slide past each other.
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THEORY OF SEA FLOORS SPREADING
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The idea that the mid-ocean ridge is a crack in the Earth's crust through which milten rock rises and spreads as a new sea floor.
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THOERY OF PLATE TECTONICS
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The idea that the Earth's lithosphere is a break in moving plates.
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THEORY OF CONTINENTAL DRIFTS
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The idea that the continents were once together and then broke apart and moved into their present position.
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SUBDUCTION
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The process by which one plate is pushed below another.
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RIFT VALLEY
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A deep, narrow valley.
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PLATES
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Rigid blocks of the Earth's outer crust.
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PANGEA
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A large mass that broke apart forming the continents.
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MID-OCEAN RIDGE
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The continuous chain of mountains on the floor of major oceans.
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DIVERGENT BOUNDARY
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The place where two plates move apart.
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CONVERGENT BOUNDARY
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A place where two plates come together.
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ASTHENOSPHERE
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A zone in the upper mantle on which the plates float.
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