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9 Cards in this Set
- Front
- Back
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The name of the single landmass that broke apart 200 million years ago and gave rise to today's continents
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Pangaea
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continents that slowly moved over
Earth's surface is |
Continental drift
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Any trace of an ancient organism that has been preserved in a rock
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Fossil
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The longest chain of mountains in the world
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Mid-ocean ridge
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A process that continually adds new material to the ocean floor
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Sea-floor spreading
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A deep valley along the ocean floor through which oceanic crust slowly sinks towards the mantle
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Deep-ocean trenches
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A section of the lithosphere that slowly moves over the asthenosphere carrying pieces of continenetal and oceanic crust
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Plate
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a well tested concept that explains a wide range of observations
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Scientific theory
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geological theory that states that pieces of Earth's lithosphere are in a constant,slow motion, driven by convection currents in the mantle
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plate tectonics
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