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Weathering and Soil Formation
Chapter 5
11
Science
6th Grade
09/05/2006
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Term
weathering
 Definition
the breaking down of rocks and other materials at the Earth's surface
Term
mechanical weathering
 Definition
weathering that does not involve changes in the chemical makeup of rocks
Term
exfoliation
 Definition
the breaking off of curved sheets or slabs parallel to a rock's surface due to weathering
Term
frost action
 Definition
the breaking apart of a rock caused by the water freezing and expanding within cracks
Term
root pry
 Definition
the braking apart of rocks caused by the growth of plant roots
Term
landslide
 Definition
a large downhill movement of loose rocks and soild caused by the pull of gravity
Term
abrasion
 Definition
the weathering away of a substance by solid particles carried by wind, water or other forces
Term
chemical weathering
 Definition
weathering that involves changes in the chemical makeup of rocks
Term
oxidation
 Definition
the process in which oxygen chemically combines with another substance
Term
carbonation
 Definition
the process in which carbonic acid reacts chemically with other substances
Term
stable rock
 Definition
a rock composed of mineral that resist chemical weathering
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