Sea Floor Spreading Lessonsn

See also continental drift a veritable legion of evidence supports the seafloor spreading hypothesis.

Sea floor spreading lessonsn.

The process by which the ocean floor sinks beneath a deep ocean trench and back into the mantle. This choice is left up to the teacher depending on the reasoning skills of the students. Sea floor intro images crustal ages of the ocean floor ncei youngest to oldest convection currents earthword subduction subduction wikipedia the science world ocean floor spreading sea floor spreading with bill nye mid atlantic ridge plate tectonics. The differences in spreading rates affect not only the geometries of the ridges but also the geochemistry of the basalts that are produced.

Mid ocean ridges that add new material to the ocean floor. The mid atlantic ridge for instance separates the north american plate from the eurasian plate and the south american plate from the african plate the east pacific rise is a mid ocean ridge that runs through the eastern pacific ocean and separates the pacific plate from the north american. Seafloor spreading occurs along mid ocean ridges large mountain ranges rising from the ocean floor. Alternatively this lesson can be taught after the concept of seafloor spreading so the evidence can be put into context.

A device that use sound waves to measure the distance to an object. When taught in series the lessons proceed in much the same way that scientists discovered seafloor spreading and plate tectonics.