Experimental Design Practice

Master experimental design by practicing identifying variables!

The variable that is being tested in an experiment is called the Dependent Independent Constant Control The variable that changes because of what you changed in an experiment is called the Dependent independent Control Constant When conducting an experiment, how many independent variables should you change? 2 as many as needed 1 SpongeBob Clean Pants 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 laundry soap she found at Sail-Mart. SpongeBob made sure to wash one pair of pants in plain water and another pair in water with 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 washe din plain water. Independent Variable Type of detergent Dependent Variable how clean the pants are Constant Variable Washing Machine What conclusion should SpongeBob have? Clean-O is a the best detergent Clean-O is a worse detergent than plain water Clean-O has the same effect that plain water has