1. Julie sees commercials for antibacterial products that claim to kill almost all the bacteria in the area that has been treated with the product. Julie asks, 'How effective is antibacterial cleaner in
preventing the growth of bacteria?" She sets up an experiment in order to study the effectiveness
of antibacterial products. Julie hypothesizes that the antibacterial soap will prevent bacterial
growth. In her experiment, she follows the following procedure.

Identify the experimental variable and three control variables in the experiment.
DEPENDENT VARIABLE:
DEPENDENT VARIABLE:
3 CONTROLLED VARIABLES: