Yogurt lab

People have been making yogurt for a long time, it is made by adding bacteria called ampicillin which turns the milk into yogurt. We are doing this lab to learn how to design a controlled experiment there will be four tubes one will be negative control one will be a positive control and one will have milk with the bacteria introduced and one will have e. Coli. We will add ten u of amp to the yogurt amp vial, and then dip a fresh inoculation loop into the yogurt and swirl the loop into the positive control. I predict that the positive control will stay yogurt the negative control will spoil and the yogurt with amp while stay yogurt. Ialso think that the e. Coli vial will