<span>A control group in a scientific experiment is a group separated from the rest of the experiment where the independent variable being tested cannot influence the results. This isolates the independent variable's effects on the experiment and can help rule out alternate explanations of the experimental results.</span>
A control group is a part of an experiment that nothing is done to. It is used to compare the results of what happens in other groups where different parts of the experiment are changed to what would have happened had nothing been done.
