Year 4M did a science experiment to see what drinks are good and bad for your teeth. We got liquids ( Ribena, tea, Coca Cola, vinegar, orange juice and water. ) and a cup with nothing inside then put an egg in each one.
We are going to leave it for two days then see what happened. The experiment is a fair test ( same temperature, amount on light etc ) so we put blue tissue over the cups so nothing could change it eg: dust.