 Continental Drift Theory
Alfred Wegener <ul><li>Had the idea of the continental drift </li></ul><ul><li>Born November 1, 1880 </li></ul><ul><li>Die...
Continental Drift Theory <ul><li>Wagner's idea that the continents slowly moved over Earth’s surface  </li></ul>
Continental Drift Theory Evidence <ul><li>Fossils </li></ul><ul><ul><li>He found fossils in Africa and South America that ...
Harry Hess <ul><li>Born May 24, 1906 </li></ul><ul><li>Died August 25, 1996 </li></ul><ul><li>He was a geologist, United S...
Sea Floor Spreading <ul><li>When the sea floor continually adds new material to the ocean floor </li></ul>
Sea Floor Spreading Evidence <ul><li>Magnetic Strips </li></ul><ul><ul><li>Magnetic poles reverse themselves (on the ocean...
Other Definitions <ul><li>Subduction- the process by which the ocean floor sinks beneath a deep- ocean trenches and back i...
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Continental Drift Theory

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  • Continental drift theory
  • Continental Drift Theory

    1. 1.  Continental Drift Theory
    2. 2. Alfred Wegener <ul><li>Had the idea of the continental drift </li></ul><ul><li>Born November 1, 1880 </li></ul><ul><li>Died November 2, 1930 </li></ul><ul><li>He was born in Berlin </li></ul><ul><li>German scientist, meteorologist, and geologist </li></ul>
    3. 3. Continental Drift Theory <ul><li>Wagner's idea that the continents slowly moved over Earth’s surface </li></ul>
    4. 4. Continental Drift Theory Evidence <ul><li>Fossils </li></ul><ul><ul><li>He found fossils in Africa and South America that were of the same species </li></ul></ul><ul><li>Landforms </li></ul><ul><ul><li>Lines of a mountain range in South America lines up with one in Argentina </li></ul></ul><ul><li>Climate </li></ul><ul><ul><li>There were fossils of plants in Spitsbergen that could survive there in the climate today </li></ul></ul>
    5. 5. Harry Hess <ul><li>Born May 24, 1906 </li></ul><ul><li>Died August 25, 1996 </li></ul><ul><li>He was a geologist, United States Navy officer in World War 2 </li></ul><ul><li>Theory of tectonic plates </li></ul><ul><li>Theory of sea floor spreading </li></ul>
    6. 6. Sea Floor Spreading <ul><li>When the sea floor continually adds new material to the ocean floor </li></ul>
    7. 7. Sea Floor Spreading Evidence <ul><li>Magnetic Strips </li></ul><ul><ul><li>Magnetic poles reverse themselves (on the ocean floor are magnetic strips) </li></ul></ul><ul><li>Molten Material </li></ul><ul><ul><li>Alvin (submarine) took pictures to see the molten material at the bottom of the sea </li></ul></ul><ul><li>Drilling Samples </li></ul><ul><ul><li>They got samples of the ocean floor so they could see if it was molten material </li></ul></ul>
    8. 8. Other Definitions <ul><li>Subduction- the process by which the ocean floor sinks beneath a deep- ocean trenches and back into the mantel </li></ul><ul><li>Mid-Ocean Ridge-the undersea mountain chain where new ocean floor is produced </li></ul><ul><li>Sonar-a device that determines the distance of an object underwater by recording echoes of sound waves </li></ul>

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