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Information about drift

Published on January 17, 2008

Author: Quintino



World Map:  World Map Pangaea Game:  Pangaea Game The Continental Drift Theory:  The Continental Drift Theory Alfred Wegener:  Alfred Wegener 1880-1930 a German meteorologist and polar explorer introduced the continental drift theory in his book, The Origin of Continents and Oceans, published in 1915 theory was rejected by his peers Wegener’s Continental Drift Theory:  Wegener’s Continental Drift Theory Pangaea, a single supercontinent, existed about 300 million years ago. It later separated into smaller land masses that drifted through the earth’s crust and continue to do so. The movement of land masses is due to centrifugal and tidal forces. Pangaea:  Pangaea Clues Pointing to Continental Drift:  Clues Pointing to Continental Drift Slide8:  1. Matching along the continental shelf of land masses Slide9:  2. The presence of coal near the poles Coal mine in Norway Slide10:  3. Traces of glaciers near the tropics Slide11:  a) Glossopteris found in South America, South Africa, Australia, India, and Antarctica Slide12:  b) Mesosaurus found in South America and Africa 4. Unexpected fossil findings across continents Slide13:  5. Distribution of modern fauna across continents Hippopotamus found only in Africa and Madagascar Slide14:  6. Broken chain of mountains across continents Slide15:  7. Similar patterns in rocks across continents The Present:  The Present The Future:  The Future Slide19:  Pangaea Ultima Dyad sharing:  Dyad sharing What do you think would happen if we had but one supercontinent in our world today? If you were presented with a new idea, how would you go about deciding whether to accept it or not? If you had a new idea, very different from what was commonly believed; would you be willing to present it? How would you go about doing so? Pop Quiz!:  Pop Quiz! Answer A or B:  Answer A or B Who first proposed the theory of continental drift?   A.  Alfred Wegener   B.  Galileo Galilee Answer A or B:  Answer A or B What was the reason that Wegener's theory of continental drift was rejected?    A.  He could not explain where the continents had moved.    B.  He could not sufficiently explain what was moving the continents.    Answer A or B:  Answer A or B Why did Wegener think that the Antarctic continent had been closer to the equator in the geologic past?    A.  presence of coal beds    B.  presence of volcanic rocks Answer A or B:  Answer A or B The supercontinent from Wegener's theory of continental drift is called ______.    A.  Gondwanaland      B.  Pangaea Answer A or B:  Answer A or B Which type of information was NOT collected by Wegener to support his continental drift hypothesis?    A.  geologic columns B. ridges on the ocean floor   Answer A or B:  Answer A or B What evidence proved that South America, Africa, India, and Australia were once located near the poles?   A.  have a winter season B. presence of glacier traces Answer A or B:  Answer A or B What does “Pangaea” mean? A.  a very big continent      B.  all the lands Answer A or B:  Answer A or B What do scientists use today to measure how much land masses move? A.  GPS satellites      B.  Hubble telescope Answer A or B:  Answer A or B Why are Mesosaurus fossils found on different continents? A.  These continents were joined together when mesosaurs lived.      B.  Mesosaurs could swim to different continents. Answer A or B:  Answer A or B What is the name of the next supercontinent predicted to exist 250 million years from now? A.  Panthalassa    B.  Pangaea Ultima The End:  The End

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