What is the difference between a controlled variable and a control group?

Thanks so so much.|||In an experiment, the control group is your standard group.





The control variable (controlled variable) is the item or items you add to the control group to make it slightly different.





For example:


You want to see how fast a piece of paper falls, depending on it's shape. Your control group would be dropping a piece of paper flat at 6 meters from the group. Your control variable would be balling up that piece of paper. Now you would repeat the experiment with the control variable - and again drop the piece of paper from 6 meters.





The difference in time it takes for the paper to drop would tell you how much effect the control variable had on the experiement.|||controlled variable is the tested group and controlled group is not tested but used in the experiment.