1) Looking at the results, what hypothesis is supported by these results?

The antibacterial soap does not stay on the surface of the skin long enough to have an impact in killing bacteria or fungi.

2) What were the dependent and independent variables in the students experiment?

Dependent variable = presence of antibacterial soap
Independent variable = number of bacterial colonies.

3) View the video shown in this article and try to offer an explanation for the results.

Antibacterial chemicals have to build up in the bacterium in order to kill it.

4) What is the danger of over use of antibacterial soaps?

Bacterial build up resistance

5) From these results, can we be confident that the antibiotic hand wash is not really effective against bacteria? Explain

No because the paper towel may have been contaminated with bacteria.

6) How would you change the experimental procedure to get more meaningful results?

The participants would need to air dry their hands and not allow have contact with any object.