This experiment is designed to show the effects of different liquids on teeth. We used eggs because similar to teeth, eggshells contain calcium compounds. We prepared 4 glasses with 4 different liquids: cherry juice drink, vinegar, coffee and blackcurrant juice drink. We dropped four eggs into each glass and left them there for 24 hours to conduct the experiment. All drinks did not visibly damage eggs but coloured them into different colours. Later we tried to clean them using toothpaste, but yo

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