Class 3 have been investigating whether liquids affect our teeth. Last week they set up their investigation using raw eggs to represent teeth and on Friday and today they observed what had happened and recorded their results. There was no change in the egg in water and milk but they saw that the eggs in tea and coke had turned quite a dark brown colour. The one in tea was the most stained. They observed that the egg placed in orange juice had some of its shell starting to dissolve. What was most amazing was that the egg in vinegar had expanded in size and was now rubbery and bounced! It had no hard shell left!