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Weathering & Erosion

Unit 3

TermDefinition
Weathering the natural process by which atmospheric and environmental agents, such as wind, rain, and temperature changes, disintegrate and decompose rocks
Mechanical Weathering the process by which rocks break down into smaller pieces by physical means
Chemical Weathering the process by which rocks break down as a result of chemical reactions
Abrasion the grinding and wearing away of rock surfaces through the mechanical action of other rock or sand particles
Weathering the natural process by which atmospheric and environmental agents, such as wind, rain, and temperature changes, disintegrate and decompose rocks
Mechanical Weathering the process by which rocks break down into smaller pieces by physical means
Chemical Weathering the process by which rocks break down as a result of chemical reactions
Abrasion the grinding and wearing away of rock surfaces through the mechanical action of other rock or sand particles
Acid Precipitation rain, sleet, or snow that contains a high concentration of acids
Ice Wedging Water seeps into cracks during warm weather. When temperatures drop, the water freezes and expands. The ice then pushes against the sides of the crack. This causes the crack to widen
Plant weathering Plant roots crack rocks; lichen grows on rocks
Animal weathering Burrowing animals cause mechanical weathering and contributes to chemical weathering
Deposition the process in which material is laid down
Caves created by the chemical weathering and erosion of soft rock like limestone by underground acids and water
Mass Movement the movement of a large mass of sediment or a section of land down a slope
Oxidation a chemical reaction in which an element, such as iron, combines with oxygen to form an oxide
Differential Weathering the process by which softer, less weather resistant rocks wear away at a faster rate than harder, more weather resistant rocks do
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
Glacier a large mass of moving ice
Mass Movement the movement of a large mass of sediment or a section of land down a slope
Created by: jeffsingleton