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Comparing The Theory Of Plate Tectonics And Continental Spread

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Sea-floor spreading, the theory of plate tectonics, and continental drift, are three different theories stating three different things. These theories have many aspects that they share, while they also have their own unique aspects. The theory of sea-floor sreading says that molten material is shot up from the mantle through mid-ocean ridges and cools, forming magnetic strips across the ocean floor. Then, as the molten material cools it gets heavier and sinks into trenches to start this process all over. sea-floor spreading is a proven theory. The theory of plate tectonics says that the earth is divided into many equal plates that are constantly moving, due to convection currents. The continental drift is the theory that all of the continents …show more content…
sea-floor spreading, like the theory of plate tectonics, is always happening. “.. Plate tectonic theory supposes that plates move very slowly - about 2 to 18 centimeters per year”(Nevins 1). The movement of plate tectonics is very slow and gradual. The movement of the continental drift is just as gradual if not more. “By about 200 million years ago, this supercontinent began breaking up”(continental drift 1). All three theories are still happening, whether slowly, or quickly. Also, all three theories have clear and direct evidence. “In the 1960’s, scientists found evidence that new material is indeed erupting along mid-ocean ridges. The scientists dived to the ocean floor in Alvin, a small submarine..”(phschool 1). Scientists found clear cut evidence that sea-floor spreading was happening. There is also clear evidence for continental drift and plate tectonics. Both sea-floor spreading and continental drift are separate parts of plate tectonics. Sea-floor spreading explains how the plates interact while continental drift was a result of the theory of plate tectonics. These are just a few of the many ways that these three theories are somewhat

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