To examine the impact of tooth decay we used eggshells as our enamel and planned a test using a range of liquids. Our independent variables were: coca cola, squash, milk and water but we ensured a fair test using equal amounts of liquid in the same sized eggshells. Issabella and D’Naiya will observe the changes every day and record what actually happens over the next few days. Most of the class think the eggshell in coca cola will be affected the most as it contains a lot of sugar. Let’s see…..