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Apologia Module #6 General Science

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Catastrophism
The view that most of earth's geological features are the result of large scale catastrophes such as floods, volcanic eruptions, etc.
Uniformitarianism
The view that most of earth's geological features are the result of slow, gradual processes that have been at work for millions or even billions of years
Humus
The decayed remains of once-living creatures
Minerals
Inorganic crystalline substances found naturally in the earth
Weathering
The process by which rocks are broken down by the forces of nature
Erosion
The process by which sediments and rock fragments are carried away by wind or rain
Unconformity
A surface of erosion that separates one layer of rock from another