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Plate Techtonics

By tmarsh5907

  • Alfred Wegener made Continental drift theory

    This theory states that there is plates on the crust, moving around. Evidence:
    Pangaea______________
    1. ___Climate Clues_____________
    2. _____Fossil Evidence__________
    3. _____Rock Clues_____________
    Why did others not believe his theory? Because it was really random and they had previous theories that explained the same thing

  • Harry H. Hess composes Seafloor Spreading

    Theory proposed:

    ____Sea Floor Spreading__________ Who proposed this theory? ________Harry H. Hess______ What does this theory state? That when the techtonic plates move in the water, magma goes up and fills the canyon, therefore making the seafloor bigger. Why did he believe this theory?
    1. High temperature on the edge of techtonic plates
    2. Continental drift theory itself

  • Plate Techtonics

    Theory proposed: _______Plate techtonics______ What does this theory state? that there is constantly moving plates on the crust on the surface of the Earth. Why was this theory created/proposed? (think critically.) Scientists collected the evidence of both Seafloor Spreading and Continental Drift, and saw that they all led to the same conclusion that there is plates on the crust of the earth, slowly moving past, and colliding with each other.