Problem: Only two teeth were used for each pH level, so natural differences between the teeth may have affected the average results. The larger error bar at pH 2.5 also shows that there was more variation in those results. The pH scale is logarithmic, meaning that each decrease of 1 pH unit makes the solution 10 times more acidic. Therefore, pH 2 is theoretically more acidic than pH 2.5 and should normally cause greater tooth decay. However, because teeth naturally vary in enamel thickness, mineral content, and surface condition, small differences in the results can happen during the experiment. Despite this anomaly, the overall trend still clearly showed that lower pH values caused greater tooth decay, which supports the prediction and background theory. Put these in simple English. Need Assignment Help?