Year 4 investigated how different drinks and liquids might affect our teeth. We placed eggs in water, cola, an energy drink, fruit juice and vinegar, then observed changes to their shells.

We used eggshells because, like the enamel that protects our teeth, they have a hard outer surface that acid can damage. Although they are not exactly the same as teeth, they help us see the effects of acid.

We compared our results and discussed what they taught us about choosing drinks and keeping our teeth healthy.