GLG 101 Plate Tectonic Theory Checkpoint

GLG 101 Plate Tectonic Theory Checkpoint - temperature is...

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Plate Tectonic Theory Checkpoint Over time, many people have had a hard time accepting the fact that movement has and will continue to occur amongst the land masses of the earth. This movement of land is called plate tectonics. Continental drift and sea floor spreading are the two major figures that contribute to the plate tectonic theory. Plate tectonics is the movement and interactions of large fragments of the Earth’s lithosphere. At one point in time, all the continents were connected and were one large body of land. The outer layer of the Earth is called the lithosphere which is very thin; is made up of solid rocks that are very strong. The solid rock rest on a mantle that consist of hotter and weaker material that is always in motion. The reason for the layer being weaker is the
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Unformatted text preview: temperature is close to where melting begins. In reality, the lithosphere is floating on the asthenosphere, which in relation is like “glass floating on water” To better understand the relationship between the lithosphere and the athenpsphere, we can see how plates move through boiling water. When water is boiling there are bubbles or big circles that churn that are called convection cells. What makes the water boil or rise is the water at the bottom of the pot which is hotter and denser than the water that is cooler at top. Once the hot water rises to the top, the cooler water is circulated to the bottom. The same thing occurs with the heat source from within the Earth on the ocean floor. The hot rocks rise as the cold rocks sink, which is a reason for the land masses shifting....
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This note was uploaded on 01/30/2011 for the course GLG 101 taught by Professor Brewer during the Fall '10 term at University of Phoenix.

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