Exercise 3Experimental VariablesEXERCISE 3: EXPERIMENTAL VARIABLESIdentify the variables tested in each of the following experiments. If applicable, determine and identify any positive or negative controls. Submit this exercise to your instructor upon completion. 1. A study is being done to test the effects of habitat space on the survival 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.