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How the Earth's crust is split into large sections called tectonic plates is described. Their movement and effects at plate boundaries are explained e.g. earthquakes, volcanoes, mountain building, ocean ridges/trenches, subduction (part of the rock cycle).
Describe the process of plate tectonics. Give specific examples of geographic features created by plate tectonics. Plate tectonics is the movement of large portions of the crust. The movement is caused by magma squeezing out along the mid-oceanic ridges pushing the plates apart in a process called seafloor spreading.