Pour four teaspoons of each acid into the labeled mugs. Next heat four cups of milk on 50% power for five minutes. Make sure the milk is at least 120 degrees F. Make sure to be careful, the milk can burn you. Record the amount of time it took to heat the milk and the final temperature of the milk. Next pour the milk into the acid filled cups. Write down observations of what is happening to the milk. Pour all four of the cups into the mugs at the same time so that all the milk is the same temperature. Mix all the mugs slowly for a few seconds. Attach a cloth to each of the clear cups with a rubber band so the opening is completely covered. When it has cooled, pour the mixtures into the clear cups. Record what the liquid in the cup looks like. Scrape the curds off the cloth and knead it into a ball. Weigh the ball and place a sheet of wax paper underneath to keep the scale clean, and record the data. Do the same for each of the mugs. Repeat the experiment two more times.
If the milk produced a hard plastic, then the data supports the hypothesis. The reactions of the milk to each acid will be compared to see which acid works the best with the milk. Each acid can cause different reactions and produce different amounts of curds. The PH level is classified as a dangerous acid which consists of the low levels two to three. Try to keeps the acid out of your