Year 4 children have been looking at boiled egg shells in different liquids. We wanted to link this to how liquids act on teeth. We put boiled eggs into water, milk, orange juice, apple juice and coke. After only 4 days we could see a difference in the egg shells.
The egg shells in water and milk had not changed at all. The egg shell in orange juice had lost the outer layer and looked white. The egg shell in apple juice had also lost part of the outer layer, looking white in parts and where the layer was left, it had turned a dark brown. The egg shell in coke had turned dark brown and felt gritty.
We will leave the egg shells a few more days to find out what happens next…
Mrs Haslam and Mrs Cassidy