Geologic Processes Plate Tectonics(板块构造学说)- is the concept that the outer surface of the Earth consist of large plates composed of the crust and the outer portion of the mantle ( lithosphere and that these plates are slowly moving over the surface of the liquid outer mantle Heat from earth core causes movement , Plates are pulling apart in some areas, and colliding in others due to the fact that the movements of the plates on this plastic outer layer of the mantle are independent of each other Building processes counteracted by processes tending to tear down land– Heat from earth core causes movement. ™ Plates are pulling apart in some areas, and colliding in others due to the fact that the movements of the plates on this plastic outer layer of the mantle are independent of each other. Geologic Processes • Plate Tectonics（板块构造学说） - is the concept that the outer surface of the Earth consist of large plates composed of the crust and the outer portion of the mantle （lithosphere ） and that these plates are slowly moving over the surface of the liquid outer mantle. – Building processes counteracted by processes tending to tear down land