Chemical Weathering - The process that breaks down rock through chemical changes, Mechanical Weathering - The process that breaks down rocks and minerals into smaller pieces but does not involve any change in their composition, Weathering - The chemical and physical processes that break down rock at Earth's surface., Erosion - The process by which wind, water, ice, or gravity transports soil and sediment from one location to another, Deposition - The process in which sediment is laid down in new locations., Runoff - Part of the water cycle where an excess of water runs down and does not sink into the soil and eventually makes it to the rivers, lakes, and oceans., Delta - A landform made of sediment that is deposited where a river flows into an ocean or lake, Velocity - the speed of an object in a particular direction, Oxbow Lake - a crescent-shaped lake (often temporary) that is formed when a meander of a river is cut off from the main channel, Meander (river) - A meander is one of a series of regular sinuous curves, bends, loops, turns, or windings in the channel of a river, stream, or other watercourse., V-shaped Valley - The characteristic shape of a valley eroded by a stream or river, U-shaped Valley - The shape of a valley formed by the erosion of a glacier, Glacier - A slowly moving mass or river of ice formed by the accumulation and compaction of snow, Aquifer - A body of rock or sediment that stores groundwater and allows the flow of groundwater., Condensation - The change of state from a gas to a liquid, Evaporation - The change of a substance from a liquid to a gas, Evapotranspiration - The evaporation of water from soil plus the transpiration of water from plants., Groundwater - Water that fills the cracks and spaces in underground soil and rock layers, Hydrologic Cycle - The cycle through which water in the hydrosphere moves; includes such processes as evaporation, precipitation, and surface and groundwater runoff, Impermeable - Impassable, not allowing passage through (such as by a liquid), Permeability - The ability of a rock or sediment to let fluids pass through its open spaces, or pores., Porosity - The percentage of the total volume of a rock or sediment that consists of open spaces., Precipitation - Any form of water that falls from clouds and reaches Earth's surface., Spring - A natural source of water formed when water from an aquifer percolates up to the surface., Water Table - The upper level of the saturated zone of groundwater, Zone of Saturation - The lower zone where water accumulates between small rock particles.,

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