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

Thanks so so much.What is the difference between a controlled variable and a control group?
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.What is the difference between a controlled variable and a control group?
controlled variable is the tested group and controlled group is not tested but used in the experiment.