| http://www.w3.org/ns/prov#value | - ??? ??? ??? landform an area of the Earth's surface with a definite shape; mountains and hills are an example. ??? ??? ??? plate in geography, a huge section of Earth's crust. ??? ??? ??? plate tectonics the theory that the Earth's crust is made of huge, slowly moving slabs of rock called plates. ??? ??? ??? mountain an area that rises steeply at least 2,000 feet above surrounding land; usually wi
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