SpongeBob noticed that his favorite pants were not as clean as they used to be. His friend Sandy told him that he should try using Clean-O detergent, a new brand of laundry soap she found at Sail-Mart. Sponge Bob made sure to wash one pair of pants in plain water and another pair in water with the Clean-O detergent. After washing both pairs of pants a total of three times, the pants washed in the Clean-O detergent did not appear to be any cleaner than the pants washed in plain water.

1. Write the SCIENTIFIC QUESTION SpongeBob wanted to investigate in a proper format

2. What is the Independent Variable?

3. What is the Dependent Variable?

4. List at least three Control Variables.