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| Term | Definition |
|---|---|
| landform | a physical feature of the earth's surface |
| mountain |  landform in which the earth's surface rises usually higher than 1,000 ft |
| valley |  long, low area of land between hills or ranges of mountains |
| canyon |  steep-walled valley created by a river or stream |
| glacier |  large body of year-round ice & snow that moves slowly across the land and deposits sediment where it melts |
| erosion |  process of wearing away or moving soil and rock by water, wind, and ice |
| deposition | process of dropping sediment in another location |
| weathering | process of wind, water, and other factors breaking down rocks into soli and tiny pieces |
| reservoir | usually a man-made storage area for fresh water |
| uplifting | the process in which the earth's crust raises to form mountains. It begins when heat from the center of the earth rises and pushes the ground up to create hills and mountains. |
| plateau |  a large area of flat land that is higher than the surrounding land |
| plain |  large, flat area of land with few trees |
| sedimentation | the process of particles clumping together and settling to the bottom of a body of water |
| river |  a large natural stream that flows into a larger body of water |
| source | the beginning of a stream or river |
| mouth | the part of a river that empties into another body of water |
| delta | a deposit of sediment where a stream enters a larger body of water |
| flood plain | the low-lying land near a stream or river that is covered by water during heavy rainfall or spring melting |
| watershed | an area of land that is drained by a common systems of streams |
| tributary | a stream or river that feeds into a larger body of water |
| flow | to move or pass along evenly in a stream |
| meander | a bend or curve in a stream or river |
| levee | an embankment usually on the side of a river used to prevent overflowing |
| slope |  land that is on an incline - slanting up or down |
| runoff | water that drains or flows after rain or melting snow into a river |
| topography |  the features on the surface of a particular area of land |
| topographic map | a map that uses contour lines to show the lope and elevation of the land |
| contour lines | lines that connect equal points of elevation |
| ground cover | dense low plants often used to hold soil in place to prevent erosion |
| ox-bow lake | a bow shaped lake formed by erosion from a meandering river or stream |
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