weathering - slow process that breaks materials into smaller pieces, erosion - the process of wind or water moving small pieces of rock, soil and sand from one place to another, deposition - the dropping off of eroded soil, sand, and bits of rock, landform - a physical feature on Earth's surface, sand dune - a hill of sand formed by wind often located near an ocean or a desert, sediment - weathered particles of soil or rock that have settled to the bottom of a body of water, delta - a triangle of sand and soil deposited at the mouth of where two bodies of water meet, valley - a long area of low land between mountains or hills, canyon - a deep valley with steep sides, glaciers - a large sheet of ice that moves slowly across the land, moraine - a long ridge-like mound formed from glacial debris left behind by a glacier, ice wedging - a type of weathering that occurs when water soaks into a material, freezes, expands, and causes the materials to split or break apart, V shaped valley - a narrow valley formed by a river, U shaped valley - a wide valley formed by ice/glaciers, sedimentary rock - a rock that forms when small bits of materials are pressed together in layers, pressure - a steady force upon a surface that pushes things together, soil - a mix of tiny rocks and bits of decomposed plants and animal material, compaction - the process through which layers of sediment are squeezed together by the weight of sediment above, removing water or air from spaces between particles of sediment, cementation - the process through which loose sediment is stuck together and hardened by minerals,

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