Determine the independent and dependent variables tested in the following experiment. If applicable, and identify any positive or negative controls. A study is being done to test the effects of habitat space on the size of fish populations. Different sized aquariums are set up with six goldfish in each one. Over a period of six months, the fish are fed the same type and amount of food. The aquariums are equally maintained and cleaned throughout the experiment. The temperature of the water is kept constant. At the end of the experiment the number of surviving fish are surveyed.
A. Independent Variable: Different sized aquariums
B. Dependent Variable: number of fish that survived
C. Controls: Negative controls are the food, maintenance, water temperature.