The Sea Floor Spreading Theory Powerpoint Presentation

Mid ocean ridge the longest chain of mountains in the world these are divergent plate boundaries.

The sea floor spreading theory powerpoint presentation.

Seafloor spreading seafloor spreading 5 4 p. Topic objectives for groupreporters c. At the mid ocean ridge molten material rises from the mantle and erupts. This process that continually adds to the ocean floor is sea floor spreading.

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 time it takes for the. Seafloor spreading theory hess dietz hypothesis 7. Seafloor spreading theory evidence ppt.

Enumerate and explain the evidences that support the sea floor spreading process. The molten material spreads out pushing older rock to both sides of the ridge. Seafloor spreading theory slideshare. Sea floor spreading enumerate and explain the initial and unusual observations that led to the formulation of the sea floor spreading hypothesis.

Sea floor spreading powerpoint 1. Sea floor spreading 1 sea floor spreading 2 sea floor spreading. The mid ocean ridge curves like the seams of a baseball along the sea floor extending into all of earth s oceans. Differentiate continental crust from oceanic crust and explain why the continental crust is older than the.

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

During world war ii geologist harry hess became interested in mapping the ocean floor using sonar. Whats people lookup in this blog. Seafloor spreading theory ppt. Powerpoint ppt presentation free to view.

Mid ocean ridge the longest chain of mountains in the world these are divergent plate boundaries. Most of the mountains in the mid ocean ridge lie hidden under hundreds of meters of. 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. In the 1960s scientists found evidence that new.

27 evidence for sea floor spreading.