Robins have been excited about the results of our science experiment to find out which liquids cause least damage to eggshells (simulating teeth).
Luckily, due to the fantastic weather, we were able to open the jars outside in the fresh air! Some were rather smelly!
The most damaged egg was by vinegar as it had completely taken away the shell. In fact, the egg was bouncy! We thought about how vinegar is used to pickle food which dates back to the Roman times (our current topic). We remebered how strong vinegar is as we found out on our trip, that Romans used to clean their communal “toilet” sponge using vinegar!
The biggest surprise was that sugar free blackcurrant squash had damaged the eggshell. It has grown a further crusty shell around it and the shell was soft in one area.
The egg in coke had a hard shell but had bady discoloured the shell. It smelt very sweet with such a high sugar content.
The egg that had been in orange juice smelt horrendous and was bady dicoloured although the shell was still hard.
The egg in milk had a hard shell and was in good condition. Similarly, was the egg that had been in water.
We used toothpaste and a toothbrush to clean the eggs and found we could remove the discolouring and build up left on the shell which reminded us of how plaque gathers on teeth.
This experiment confirmed what the dentist had explained to us. Liquids with sugar and acid cause the most damage to our teeth. We concluded that as as result of this experiment, we should avoid these drinks and replace them with water or milk.