Term
Theory of Continental Drift |
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Definition
| the ideas that all of the continents were one joined and are still apart. |
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| The name of the giant land that broke apart about 200 million years ago. This idea was proposed by a German scientist named Alfred Wegener in 1912. |
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| was detected years later during World War II. Radar showed mid-ocean ridges where molten lava is pushing upward and spreading apart the ocean floor (example: Mid-Atlantic Ridge) |
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Definition
| is a theory proposed in the 1960's which explained continental drift. It states that the Earth's lithosphere is broken into plates that "float" on the upper mantle. |
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Definition
| are vibrations produced when rocks break or move along a fault releasing energy as seismic waves. |
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