Justin B believes that the temperature lowering during the fall months is what causes the color of the leaves to change. He sets up and experiment where in he placed someplants in 80 degrees rooms and some in 60 degrees rooms. He then observed the color of the leaves for a total of 1 month. At the end of the month Justin observed that 3/4 of the plants in the 60 degree temperature had been to change colors and only 1/4 of the plants in the 80 degree temperature began to change colors. Control group- ?