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Chapter 7 Weathering

Weathering The process that breaks down rock and other substances at Earth's S
Erosion The movement of rock particles by water, ice or wind.
Mechanical Weathering Process that physically breaks rock into small pieces.
Abrasion The grinding away of rock by rock particles carried by wind, ice, water or gravity.
Ice Wedging Water ice widens and deepens cracks in rocks eventually splitting rock.
Chemical Weatering Rock is broken down by chemical changes, water, acid, CO, ect.
Permeable Water can eaisly penetrate some rocks because of tiny air spaces.
Rates of Weathering A type of rock (Permaeble or not) and climate (hot & wet, or Cold & dry for example)
Soil Loose weathered material on the Earths surface that plants groww in.
Bedrock Solid layer of rock beneath the Earths surface.
Humus Rich fertile dark colored material that forms as plant and animal remains decay.
Loam Soil that is about equal parts of clay, sand and slit.
Topsoil (Horizon A) A crumbly dark brown soil that is a mixture of humus, caly, and other minerals..
Subsoil (Horizon B) Clay and other particals washed down from horizion A, but little humus.
Litter A loose layer normally of leaves on the surface.
Decomposer Organisms that breakdown the remains of dead organisms and digest them with chemicals, bacteria, fungi, and worms.
Created by: jessie427