The Sea Floor 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.

The sea floor spreading theory powerpoint presentation. Seafloor spreading theory evidence ppt. 3 sea floor spreading sonar a device that bounces sound waves off under water objects and then records the echoes of these sound waves. Differentiate continental crust from oceanic crust and explain why the continental crust is older than the. Seafloor spreading seafloor spreading 5 4 p.

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. This process that continually adds to the ocean floor is sea floor spreading. Mid ocean ridge the longest chain of mountains in the world these are divergent plate boundaries. The mid ocean ridge curves like the seams of a baseball along the sea floor extending into all of earth s oceans.

Sea floor spreading sea floor spreading sea floor spreading ppt online sea floor spreading. Powerpoint ppt presentation free to view. During world war ii geologist harry hess became interested in mapping the ocean floor using sonar. Seafloor spreading theory hess dietz hypothesis 7.

Most of the mountains in the mid ocean ridge lie hidden under hundreds of meters of. The molten material spreads out pushing older rock to both sides of the ridge. Seafloor spreading theory slideshare. Sea floor spreading powerpoint 1.

Mid ocean ridge the longest chain of mountains in the world these are divergent plate boundaries. Enumerate and explain the evidences that support the sea floor spreading process. 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. Whats people lookup in this blog.

Powerpoint click to download the ms powerpoint file 34 mbytes pdf click to view or download the presentation in pdf 2 1 mbytes ht ml cl ick to view the presentation in html format. Sea floor spreading enumerate and explain the initial and unusual observations that led to the formulation of the sea floor spreading hypothesis. The seafloor spreading theory powerpoint presentation. Seafloor spreading theory ppt.

Sea floor spreading 1 sea floor spreading 2 sea floor spreading. 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. 27 evidence for sea floor spreading. The time it takes for the.

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