my project

continental drift, sea floor spreading, and plate tectonics

continental drift

Alfred Wegener was the one who proposed the idea of continental drift. He tried so hard for people to believe him but no one believed him until he died when more evidence came out

Is the theory valid or not

yes it is valid because of all the examples that came out one was freshwater fossil on to different continents that were separated by salt water here is the link to my continental drift

seafloor spreading

Harry Hess was the one who came up with the idea. He had more evidence like the mid-ocean ridges

is this valid

yes it is valid because the young and old rocks and the magnetic reversal poles

plate tectonics

there were too many people who said it was called that. when the plates hit each other they make mountains, volcanoes,and ridges. But when they move apart they make valleys