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Unit 8

Weathering,Erosion,Deposition and Landforms

TermDefinition
Weathering The natural process by which atmosphere and environmental agents, such as wind, rain, and temperature changes, disintegrate and decompose rocks.
Physical Weathering The mechanical breakdown of rock 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 by the scraping action of other rocks driven by water, wind, and gravity.
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; in geology, oxidation is a form of chemical weathering.
Acid Precipitation Precipitation, such as rain, sleek, or snow, that contains a high concentration of acid, often because of the pollution of the atmosphere.
Erosion The process by which wind, water, ice, or gravity transports soil and sediment from one location to another.
Deposition The process in which material is laid down. (Earth science) The change of state from a gas directly to a solid. (Physical science).
Floodplain An 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 steam.
Alluvial Fan A fan-shaped mass of rock material deposited by a steam when the slope of the land decreases sharply.
Groundwater 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 low ridge of sand deposited along the shore of a lake or sea.
Barrier Island A long ridge of sand or narrow island that lies parallel 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
Created by: Mia Giusta
 

 



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