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2/10 NB Test
| Question | Answer |
|---|---|
| Keratin | fibrous protein which forms the basic substance of nails, hair, horns, and hoofs. |
| Watershed (drainage basin) | area of land that is drained by a water system |
| Continental Divide | runs through the Rocky Mtns. separates flow of water into the Atlantic or Pacific |
| Divide | higher ground that separates watersheds |
| Channel | path that water flows |
| Tributary | a stream that flows into a larger body of water |
| Stream | narrow deep channel that is filled with water |
| River | wider, deeper, larger stream |
| Gradient | change in elevation |
| High Gradient | high erosive energy |
| Low Gradient | little erosive energy |
| Discharge | Amount of water a river carries |
| Increased By | major storms, melted snow |
| Increased Affects | more erosive energy, gain speed, change its load |
| Load | materials carried by a stream |
| Size | affected by speed |
| If Fast | larger particles |
| If Slow | smaller particles |
| Bedload | large rock |
| Suspended | small rocks, sediment |
| Dissolved | solutions, pollutants, byproducts |
| Youthful | quick, erode deep not wide, steep gradient, waterfalls, strong rapid classes |
| Mature | medium, erode wide, not deep, no waterfalls, small rapids, fed by many tributaries (French Broad) |
| Old | low gradient, little erosive energy, floodplains |
| Rejuvenated | land been raised by tectonic activity, cut deeply into valley floor forming step like formations called terraces |
| Alluvial Fan | mass of material deposits by a stream to land |
| Deposition | process where material is laid down or dropped |
| Sediment | deposited where the water or current decreases, inside bank |
| Slows Down | along the inside bank of the river |
| Placer Deposits | heavy minerals that deposits @ a place in the river where the water slows down |
| Erosion | occurs along the outside bank of the bend (faster) |
| Delta | Forms in water, fan shaped mass of material deposited at the mouth of a stream |
| Dam | barrier that can redirect the flow of water |
| Levee | build up of sediment deposited along the channel of a river |
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