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weathering and soil formation
chapter7 key terms
12
Science
7th Grade
12/05/2006

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Term
weathering
Definition
is the process that breaks down rock and other sub-stances at earth's surface.
Term
mechanical weathering or
(physical weathering)
Definition
the type of weathering in which rocks is physically broken down into smaller pieces.
Term
abrasion
Definition
refers to the grinding away of rocks by rock partcles carried by awter, ice, wind, or gravity.
Term
erosion
Definition
is the movement of fock particles byawter, ice, wind, or gravity.
Term
ice wedging
Definition
when the ice melts, the water seeps deeper into the cracks
Term
chemical weathering
Definition
is the process that breaks down rock through chemical changes.
Term
permeable
Definition
means that a material is full of tiny, connected air spaces that allow water to seep through it.
Term
soil
Definition
is loose, weathered material on earth's surface in which plants grow.
Term
berock
Definition
is the solid layer of rock benath the soil.
Term
humus
Definition
is a dark colored substance that forms as plant and animal remains decay.
Term
loam
Definition
soil that is made up of about equal part of clay, sand, and silt.
Term
loam
Definition
soil that is made up of about equal part of clay, sand, and silt.
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