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All of the following affect the thickness of the soil that develops on a site EXCEPT
Experimental Research
A research design that permits inferences about cause and effect by exerting control, systematically manipulating a variable, and studying the effects on measured variables.
Control Group
In experimental research, the group of participants that does not receive the experimental treatment, used for comparison purposes.
Random Assignment
A method of assigning participants that ensures each participant has an equal chance of being assigned to the experimental group or control group.
Experimental Group
The group in an experimental study that receives the treatment or intervention being tested.
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