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CGF3M
Legge Unit 3 vocabulary
| Question | Answer |
|---|---|
| river capture | When a river has been diverted from its own bed. |
| oxbow lake | An area of poor drainage that occurs when a meander is cut off from the main river channel and forms a curved body of water. |
| tributary | A small river that feeds into a larger river. |
| distributary | A river branch that flows away from the main stream. |
| drainage basin | An area that collects water into the lowest level. |
| El Nino | An irregularly reoccurring flow of unusually warm waters from the Pacific Ocean. |
| tsunami | A super wave that is huge in height and width created by a volcano or earthquake. |
| ground well | A hole dug down below the water table. |
| Artesian well | A hole dug down to an aquifer. |
| hydrologic cycle | the sequence of conditions through which water passes from vapor in the atmosphere through precipitation upon land. |
| dew point | the temperature at which a vapor begins or would begin to condense |
| relative humidity | the ratio of the amount of water vapor actually present in the air to the greatest amount possible at the same temperature |
| adiabatic lapse | the rate of decrease with height for an atmospheric variable |
| evapo-transpiration | loss of water from the soil both by evaporation and by transpiration from the plants growing in the area |
| thermo-haline currents | the part of the large scale ocean circulation is driven by global density gradients created by surface heat and freshwater fluxes |
| oceanography | the study of oceans |
| wave trains | a succession of similar waves at equal intervals |
| ground truthing | used in cartography and meteorology to determine statistical values derived from remotely sensed images, assumed that the same values elsewhere will represent the same surface features |
| cyrosphere | the part of the earth that is covered in ice |
| permafrost | a permanently frozen layer at variable depths below the surface |
| glacial surge | when an ice mass increases speed suddenly |
| muskeg | thick deposit of partially decayed vegetable matter of wet barren regions |
| zone of ablation | how much a glacier loses material through melting, evaporation, iceberg calving, and sublimation |