Jacques noticed that his tank mates were not as clean as they used to be. His friend Peach told him that he should try using Clean-O soap, a new
brand of soap she found at Whale-Mart. Jacques made sure to clean one tank
mate in plain water and another in water with the Clean- soap. After washing
both tank mates a total of three times, the tank mate washed in the Clean-
soap did not appear to be any cleaner than the mate washed in plain water.
a. What was the problem Jacques wanted to investigate?
b. What is the independent variable?
c. What is the dependent variable?
d. What should Jacques' conclusion be?
e. What could be a source of error in this experiment?