7454.magma

Theories of Motion on Earth’s Surface

By sjdowns
  • Period: to

    Theory Proposed

    Theory proposed:
    Continental Drift
    Who proposed this theory?
    Alfred Wegener
    Why did he believe this theory?
    1. Pangaea
    1. Rock Clues
    2. Fossil Evidence
    3. Climate Clues
    Why did others not believe his theory?
    The other people didn't believe his theory because he cloud not explain how continents moved, and didn't have enough models to resprent what he was trying to say.

  • Eary in 1960 Theory proposed

    Eary in 1960 Theory proposed
    Theory proposed:
    Seafloor Spreading
    Who proposed this theory?
    Herry Hessy
    What does this theory state?
    The Seafloor Spreading are moving apart Why did he believe this theory?
    1. The youngest rock were new because when Seafloor spreading the new rock grow
    2. When Seafloor Spreading the older rock became older. And the oldest rock are near the edges of continents or deep sea trenches.

  • 1970 Theory proposed

    1970 Theory proposed
    Theory proposed:
    Earth’s Tectonic Plates What does this theory state?
    How continents could move around Earth’s surface. Why was this theory created/proposed? (think critically.)
    Scientists recognized that it was the mechanism to explain how continents could move around Earth’s surface and it how create earthquakes, volcano,mountain, ridges and flat plains.