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Tectonic plates are large plates of rock that make up the foundation of the Earth's crust and the shape of the continents. The tectonic plates comprise the bottom of the crust and the top of the Earth's mantle.There are ten major plates on Earth and many more minor ones.ectonic plates are large plates of rock that make up the foundation of the Earth's crust and the shape of the continents. The tectonic plates comprise the bottom of the crust and the top of the Earth's mantle. There are ten major plates on Earth and many more minor ones.
Plate tectonics is useful in the field of geology because it can be used to explain a variety of geologic processes, including volcanic activity, earthquakes, and mountain building.   Plate tectonics are what creates some of the worlds natural diasters.E.g: Tsunami's, Earthquakes, ect.o they are not the same thing.    Plate Tectonics is the study of mechanisms and the results of  large-scale movement of the earth's crust.    Tectonic Plates â¦ are large sections of the earth's crust that float  on top of semi-molten rocks of the upper mantle.