You will learn how to test for pH levels. Put some of each substance into a small cup and label the cups according to their contents. Group the students and provide each group with some of the testing substances. Have the groups record their findings on a chart. After the findings are recorded, arrange the substances according to their pH levels, from the strongest acid to the strongest base.
Students can compare the color changes seen in the segment to their own results from the activity.
The yeast cells functioning in a sugar solution cause this response. Test some soil samples mixed with water. Dissolve dish soap in water and test it. Test again using laundry detergent. Investigate the effect that oxygen has on the darkening of fruit.