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Soil
Describing Soil Scientifically
12
Science
7th Grade
11/07/2010

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Cards

Term
Composition
Definition
What something is made of
Term
decomposing
Definition
the process by which organic matter breaks down
Term
weathering
Definition
the process by which natural forces break down rocks
Term
organic matter
Definition
material from living organiismisms
Term
nutrients
Definition
produced by decomposed organic materials and feeds plants.
Term
humus
Definition
decayed organic matter in soil
Term
mechanical weathering
Definition
the breakdown of rock into smaller pieces of the same material without changing its composition.
Term
exfoliation
Definition
the process in which layers or sheets of rock gradually break off
Term
abrasion
Definition
the process of weathering something down by friction
Term
chemical weathering
Definition
the breakdown or decomposition of rock that takes place when minerals through chemical processes
Term
soil horizon
Definition
A layer with physical and chemical properties that differ from those of soil layers above or below it.
Term
soil profile
Definition
the soil horizons in a specific location; a cross section of soil layers that displays all soil horizons.
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