We’ve been looking at teeth in-depth in Year 4 recently, particularly the role of our enamel in protecting our teeth. Last week, the class designed an experiment to test how different liquids would affect our enamel. This week, we carried out our investigation. We used eggshells to replicate teeth, and we tested 6 different liquids: water, milk, blackcurrant, coffee, Diet Coke and vinegar.

To run the experiment, we soaked an egg in each liquid for 2 days. We then removed the eggs and wrote our observations. We then spent two minutes brushing and described the shells again. Vinegar was found to have the worst effect as it dissolved the shell just leaving the membrane to protect the egg inside. The darker liquids stained the eggs, and the water and milk didn’t change the eggshells much.