…and the results are in! As many of the children predicted, the fizzy energy drink had an adverse effect on the egg-shell (our teeth in this investigation) with a large amount of discolouration and some flaking occurring. Coffee also caused a lot of discolouration. However, the effect of the vinegar was a surprise. It dissolved the eggshell completely, leaving only the membrane – resulting in a slimy, squishy egg. The milk left a thin white film on the egg-shell but caused no damage and the egg in the water remained unchanged.

From these results, we concluded that fizzy energy drinks and vinegar were the worst liquids for our teeth as they caused the most decay.


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