The Sea Floor Spreading Theory Powerpoint Presentation

3 sea floor spreading sonar a device that bounces sound waves off under water objects and then records the echoes of these sound waves.

The sea floor spreading theory powerpoint presentation.

Most of the mountains in the mid ocean ridge lie hidden under hundreds of meters of. In 1912 when alfred wegener proposed that the continents had once been joined together and had split apart the biggest weakness in his hypothesis was the. Seafloor spreading theory hess dietz hypothesis 7. Differentiate continental crust from oceanic crust and explain why the continental crust is older than the.

Mid ocean ridge the longest chain of mountains in the world these are divergent plate boundaries. S eafloor spreading this presentation reviews the major features of the seafloor and harold hess original theory of seafloor spreading. In the 1960s scientists found evidence that new. Sea floor spreading 1 sea floor spreading 2 sea floor spreading.

This process that continually adds to the ocean floor is sea floor spreading. Whats people lookup in this blog. Seafloor spreading theory ppt. The mid ocean ridge curves like the seams of a baseball along the sea floor extending into all of earth s oceans.

The molten material spreads out pushing older rock to both sides of the ridge. Seafloor spreading theory slideshare. Topic objectives for groupreporters c. Sea floor spreading enumerate and explain the initial and unusual observations that led to the formulation of the sea floor spreading hypothesis.

Seafloor spreading seafloor spreading 5 4 p. The time it takes for the. During world war ii geologist harry hess became interested in mapping the ocean floor using sonar. Sea floor spreading powerpoint 1.

The seafloor spreading theory powerpoint presentation. 141 147 seafloor spreading until the 1950 s little was known about the ocean floor but after sonar was invented a complex ocean floor. At the mid ocean ridge molten material rises from the mantle and erupts. Mapping the mid ocean ridge the east pacific rise is just one part of the mid ocean ridge the longest chain of mountains in the world.

Evidence for sea floor spreading in 1960 harry hess studied wegener s theory hess proposed the radical idea that the ocean floorsmove like a conveyer belt which in turn move thecontinents this movement begins at the mid ocean ridge whichforms along in a crack in the oceanic crust. Enumerate and explain the evidences that support the sea floor spreading process. Seafloor spreading theory evidence ppt. Powerpoint ppt presentation free to view.

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