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Independent Variable Definition


Definition: An independent variable is the variable that is changed in a scientific experiment.

Independent variables are the variables that the experimenter changes to test their dependent variable.
Common Misspellings: independant variable
A scientist is testing the effect of light and dark on the behavior of moths by turning a light on and off. The independent variable is the amount of light and the moth's reaction is the dependent variable.

A change in the independent variable directly causes a change in the dependent variable.
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