REPLICATE TOOTH DECAY USING EGGS
Explore the impact of different chemicals on the colour and strength of your teeth
ETTING UP
Fill one glass with vinegar, almost to the top. Place one whole boiled egg, in its shell, into the cup. The egg should be fully submerged.
REPEAT
Repeat this for each of the eggs in separate glasses. Each glass should have a different drink or liquid in it.
A FAIR EXPERIMENT
Place the eggs into the four cups in quick succession so that they are all submerged for similar times. You can use different liquids, but for the best results use juices, coffee and vinegar.