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BJU Space/Earth 16
BJU - Space and Earth Science - Chapter 16 (4th edition)
| Term | Definition |
|---|---|
| stream | Flowing water that follows a distinct course over the land. |
| elevation profile | A description of how a stream changes elevation from its beginning to its end |
| source | The origin and the highest level of a stream |
| stream gradient | The change of elevation of a stream’s channel with horizontal distance; also called the steepness or slope of the channel |
| mouth | The point at which a stream empties into another body of water; located at base level for that stream |
| base level | The lowest elevation to which a stream can flow |
| cross-section | In general, a view of an object in which it is sliced in half to show its shape or arrangement. A stream’s shows the shape of the streambed at a given location. |
| tributary | A smaller stream that feeds into a larger one |
| stream system | A stream and all of its tributaries |
| drainage basin | The land area that a stream drains, bounded by the basin divide |
| divide | A ridge of mountains, hills, or even just higher land that separates one drainage basin from another |
| meander | A wide, looping bend in a low-gradient stream |
| floodplain | A broad, level area surrounding a low-gradient river, created by regular flooding of a river. Usually has very fertile topsoil deposited by floods |
| perennial stream | Continuous; flows year-round |
| intermittent stream | Does not flow year-round; flows only after heavy rainstorms, from snowmelt, or during wet seasons |
| lake | Any isolated body of water that doesn’t freely share water with the ocean |
| eutrophication | An increase of nutrients in a lake or stream. Causes blooms of algae and bacteria, reduces oxygen levels, increases turbidity, & can change the kinds of organisms living in the lake |
| limnology | The science of all forms of surface and underground fresh water, including lakes and rivers |
| thermal turnover | The seasonal process by which lakes exchange surface and bottom water as they cool and warm with the seasons |
| seiche | Small oscillations in water level similar to the sloshing in a bathtub caused by changes in air pressure as weather systems move across a body of water |
Created by:
marchscience
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