Plate Tectonics: Section 3 / Key Concepts & Terms
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Created by:
Flashcardfanatic on December 1, 2009
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Chapter 4, Section 3. Drifting Continents.
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6 terms
Terms | Definitions |
|---|---|
| What was Alfred Wegener's hypothesis about the continents? | Wegener's hypothesis was that all the continents were once joined together in a single landmass and have since drifted apart. |
| What evidence supported Wegener's hypothesis? | Wegener gathered evidence from different scientific fields to support his ideas about continental drift. He studied land features, fossils, and evidence of climate change. |
| Why was Wegener's hypothesis rejected by most scientists of his day? | Unfortunately, Wegener could not provide a satisfactory explanation for the force that pushes or pulls the continents. |
| continental drift | Wegener's idea that the continents slowly moved over Earth's surface. |
| Pangaea | the "supercontinent" formed when all the continents drifted together; it means "all lands"; existed about 300 million years ago. |
| fossil | any trace of an ancient organism that has been preserved in rock |
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