How Do You Like Your Bread, Clean or Dirty?

The first day of class, Dr. Kat decided to conduct an experiment. She had three slices of bread. Each slice was in its own zip-loc bag. The first slice, she didn't want us to touch. That was her control variable. For the second slice, she wanted each of us to rub our dirty hands all over it. Before touching the third slice, she had us properly wash our hands. Her independent variable was the act of touching the bread. The dependent variable was whether we had/hadn't washed out hands before touching the bread. The goal of the experiment is to see which slice will grow the most mold. 

A few weeks later, she brought the three slices of bread back to class so that we could see how the mold was progressing. I'm sure you can already guess which slice is the worst. It was definitely a sight to see!

While it appears that the one labeled clean is perfect, that is not entirely true. The day Dr. Kat brought these to class she did point out that there is a little area with something weird going on. I haven't been able to see them lately, but I'm sure they all have some mold on them at this point. I can only imagine what the "dirty" one looks like (shivers in disgust). 

Moral of the story: ALWAYS wash your hands before you eat ladies and gents!!

Sincerely,

Christina