The Theory of Plate tectonics

Did you know that plate tectonics are the movement of the earth's crust. The plate tectonics are possibly the most important geological theory. All of the earth's plates are moving in different directions and speed the normal speed is 10 cm per year. Did you know that boundry is when two plates meet together in the same place. This theory became a problem in the 1960's and or the 1970's. Convergent Boundaries is when earth's plate tectonics crash or gets crunched together. Divergent boundaries is when earth's plates come apart from different places.  

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