What Causes Plate Tectonics?

Answer

The movement of continental plates under the earth's outer crust is what is known as plate tectonics. This movement in certain areas of the world causes earthquakes.
Q&A Related to "What Causes Plate Tectonics?"
Tectonic plates are composed of the crust and upper mantle rock which is lighter than the less dense mantle. Rising and falling convection currents in the mantle cause imperceptibly
http://wiki.answers.com/Q/What_makes_the_plates_in...
Mount St. Helens is part of the Pacific "ring of fire, an area of intense volcanoes and earthquakes due to tectonic movement. There are seven major (primary) tectonic plates
http://www.ehow.com/info_8132589_moves-tectonic-pl...
Plate tectonics (from the Late Latin tectonicus, from the Greek: ?
http://www.chacha.com/question/what-tectonic-plate...
earthquakes, volcanoes, mountain ranges, faults,island arcsregional metamorphism, tectonic uplift forming plateaus, the creation and demise of oceans, rift valleys (and the lakes,
http://answers.yahoo.com/question/index?qid=201203...
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