Question

Jenny wants to determine if a new brand name washing detergent is better than her old detergent. She washes 10 dirty T-shirts with the new washing detergent. After washing, she thinks they are cleaner using the new detergent. What can she do to be sure the new washing detergent works better than the old detergent?

Please be sure to use appropriate vocabulary from our Experimentation slideshow. (control, independent variable, constant, dependent variable, scientific method, etc are all options, not all have to be used)
One sentence for an 8th grader

Answer 1

To determine if the new washing detergent is really better, Jenny should conduct a controlled experiment where she washes the same number of dirty T-shirts with both the new detergent and her old detergent, keeping everything else constant, and then compare the cleanliness of the shirts to see which one works better.