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| Term | Definition |
|---|---|
| runoff |  water that moves over the Earth's surface |
| rills |  tiny grooves in the soil formed by runoff |
| gullies | larger grooves formed by rills flowing into one another |
| stream | channel along which water is continually flowing down a slope |
| river | a large stream |
| tributary | stream or river that flows into a larger river |
| drainage basin | land area from which a river and its tributaries collect water |
| divide | high ground between two drainage basins |
| flood plain | wide, flat area of land along a river |
| meander | looplike bend in the course of a river |
| oxbow lake | meander that has been cut off from the river |
| alluvial fan | a wide, sloping deposit formed where a stream leaves a mountain range |
| delta | sediment that builds up into a landform at the mouth of a river |
| groundwater | underground water |
| energy | ability to do work or cause change |
| potential energy | energy that is stored and waiting to be used later |
| kinetic energy | energy an object has, due to its motion |
| abrasion | wearing away of rock by a grinding action |
| load | amount of sediment that a river carries |
| friction | force that opposes the motion of one surface as it moves across another surface |
| turbulence | movement of water in every direction (rough waters) |
| wetland | area of land that is covered with a shallow layer of water during some or all of the year |
| estuary | coastal inlet or bay where fresh water from a river mixes with salty ocean water |
| salinity | amount of salt in water |
| water pollution |  addition of any substance that has a negative effect on water or the living things that depend on the water |
| point source |  a specific source of pollution, such as a leaking pipe |
| nonpoint source |  widely spread source of pollution that can't be tied to a specific place of origin |
| acid rain |  rain that is more acidic than normal, due to atmospheric pollution |
| pesticides |  chemicals intended to kill insects and other organisms that damage crops |
| pollutants |  substances that cause pollution |
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| Terms | 30 |
| Creator | eyuan |
| Created | November 2, 2008 |
| Group | FTB Science |
| Subjects | sixth grade science, science vocabulary |
| Access | Anyone |
| Edit | Creator Only |