erosion - The movement of sediments by wind, water, or ice, deposition - The dropping of sediments in a new location, weathering - The breaking up of rocks into sediments, sediments - Bits of rock, soil, sand, shells, and organic materials, landform - Natural land feature on the Earth's surface, canyon - A deep, narrow valley with steep sides, delta - A large flat area at the mouth of a river formed by the deposition of sediment, sand dune - A hill of sand deposited and changed by the wind, u-shaped valley - A valley formed by the movement of a glacier, earthquake - A sudden shaking, rolling, or shock in the Earth's surface, landslide - A sudden downhill movement of a huge mass of rock, soil, and mud, volcanic eruption - The release of lava, smoke, dust, and ash from a volcano, volcano - A mountain built up of cooled and hardened lava that erupted from Earth, magma - Melted rock found deep under the Earth's surface, lava - Melted rock that erupts or flows out of an opening (vent) in the Earth's surface, island - An area of land completely surrounded by water, mountain - A tall landform with steep slopes and a summit or peak at the top, hill - Land that is slightly higher than its surroundings and has gently sloping sides,

Changes to Earth's Surface

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