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Unit 8
| Question | Answer |
|---|---|
| weathering | The natural process by which atomspheric and environmental agents, such as wind, rain, and temperature changes, disintegrate and decompose rocks. |
| physical weathering | the mechanical breakdown of rocks into smaller pieces that is caused by natural processes and that does not change the chemical composition of the rock material |
| abrasion | the process by which rock is reduced in size. |
| chemical weathering | the chemical breakdown and decomposition of rocks by natural processes in the environment. |
| oxidation | a chemical reaction in which a material combines with oxygen to form new material |
| acid precipitation | precipitation such as rain sleet or snow that contains acids often because of the pollution of the atmosphere |
| erosion | the process by which wind water ices or gravity transports soil and sediment from one location to another |
| deposition | the process in which material is laid down |
| floodplain | the area along a river that forms from sediments deposited when the river overflows its banks |
| delta | a mass of material deposited in a triangular or fan shape at the mouth of a river or stream |
| alluvial fan | a fan shaped mass of rock material deposited by a stream when the slope of the land decreases sharply. |
| ground water | the water that is beneath Earth's surface |
| shoreline | the boundary between land and a body of water |
| beach | an area of the shoreline that is made up of deposited sediment. |
| sandbar | a long ridge of sand deposited a long the shore of a lake or sea |
| barrier island | a long ridge of sand or narrow island that lies parallel to to the shore |
| dune | a mound of wind deposited sand that moves as a result of the action of wind |
| loess | fine grained sediments of quartz feldspar hornblende mica and clay deposited by the wind |
| glacier | a large mass of ice that exists year round and moves over land |
| glacier drift | the rock material carried and deposited by glaciers |
| creep | the slow downhill movement of weathered rock material |
| rockfall | the rapid mass movement of rock down a steep slope or cliff |
| landslide | the sudden movement of rock and soil down a slope |
| mudflow | the flow of a mass of mud or rock and soil mixed with a large amount of water |
| mountain | an area of significantly increased elevation on earths surface usually rising to a summit |
| lake | a filled or partially filled basin of fresh or salt water surrounded by land. |
| river | a large natural stream of water that flows across land surfaces within a channel |
| coastline | a location where land and ocean surface meet. |
Created by:
Sailor Allen