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Tooth decay investigation

Year 4 have carried out an investigation into tooth decay. We discussed how to carry out a fair test and which variables we will measure and  which we would keep the same. Our investigation question was which liquid causes the most tooth decay? 

 

We didn't use real teeth of course! We used eggs instead, as eggshells and our teeth are made up of calcium. We tested vinegar, coca-cola, apple juice, water, coffee and milk. 

 

Can you guess which egg was submerged in which liquid from the photograph below?

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