Yesterday and today in class, we observed the digestion of an egg. Not a real digestion though! The whole science class had been placed into groups that worked together to observe 4 test tubes.The test tubes were filled with different substances and they all had 3 cubes of egg white. Test tube A contained 10 mL of pepsin. B held 5 mL of pepsin and 5 mL of water.C was filled with 10 mL of hydrochloric acid while D had 5 mL of pepsin and 5 mL of hydrochloric acid.Then we looked at the egg whites in all the tubes and my group saw that none of the egg whites were different. Then we put drops of  what was inside the tubes onto strips of litmus paper, which told if the item inside each test tube was acidic or not. The second day, we tested the test tubes and saw that some of the egg whites were beginning to be digested, though when the litmus paper was tested, it had the same results as the first day.