Sea Floor Spreading Earth Drawing Easy

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Sea floor spreading earth drawing easy.

Have you noticed lately that your students just aren t listening when you try to teac. Seafloor spreading was proposed by an american geophysicist harry h. Index foraminifera fossils found in the basal ocean sediment just above the basalt in each dsdp hole are illustrated in figure 6. Finally students may need their earth science reference tables esrt for parts of the lesson a document used widely in the new york state earth science regents course as well this lesson is the first day of a two day lesson involving the process of sea floor spreading.

The regions that hold the unique record of earth s magnetic field lie along the mid ocean ridges where the sea floor is spreading. By the use of the sonar hess was able to map the ocean floor and discovered the mid atlantic ridge mid. Mantle convection is the slow churning motion of earth s mantle. Seafloor spreading and other tectonic activity processes are the result of mantle convection.

The mid ocean ridge is where the seafloor spreading occurs in which tectonic plates large slabs of earth s lithosphere split apart from each other. Strong evidence of seafloor spreading and plate tectonics. Convection currents also recycle lithospheric materials back to the mantle. The east pacific rise is a mid oceanic ridge a divergent tectonic plate boundary located along the floor of the pacific ocean it separates the pacific plate to the west from north to south the north american plate the rivera plate the cocos plate the nazca plate and the antarctic plate it runs south from the gulf of california in the salton sea basin in southern california to a point.

Paleomagnetism led the revival of the continental drift hypothesis and its transformation into theories of sea floor spreading and plate tectonics. I didn t know it would come to this. Sea floor spreading exercise part b. This idea played a pivotal role in the development of the theory of plate tectonics which revolutionized geologic thought during the last quarter of the 20th century.

Convection currents carry heat from the lower mantle and core to the lithosphere. Spreading rates determine if the ridge is fast intermediate or slow. Plate tectonics sea floor spreading earth science notebook this no prep product is a complete unit bundle on plate tectonics. The rate at which new oceanic lithosphere is added to each tectonic plate on either side of a mid ocean ridge is the spreading half rate and is equal to half of the spreading rate.

Spreading rate is the rate at which an ocean basin widens due to seafloor spreading.