State the Problem:What will happen when a hard boiled egg is

soaked in vinegar?What will happen when a raw egg is soaked

in vinegar?

Research:The vinegar will have a chemical reaction to

the egg shell. The vinegar will attack the calcium carbonate of the eggshell.

Hypothesis:The vinegar will react to the calcium in the

egg shell. It will eat away the shell and leave a rubbery outer layer. The hard boiled yolk will allow the egg to bounce like a ball.

The vinegar will react to the calcium in the egg shell of the raw egg but the outer layer will not be as rubbery as the hard boiled egg. The raw insides will not allow the egg to bounce.

Materials:Hard-boiled eggRaw eggGlass jarVinegar

Procedure: Place the egg in the glass jar and cover it completely with the vinegar. Wait three days and test to see if it bounce. Repeat procedure for both boiled and raw egg.

The hard boiled egg bounced like a ball. The height of the bounce reached the ceiling. The raw egg did not bounce. The raw egg left a mess from the raw yolk on the floor. The egg shells did react to the vinegar but the boiled yolk reacted more like rubber compared to the raw yolk.

The acid from the vinegar reacted to the calcium carbonate egg shell. The reaction caused the egg shell to form a rubber substance. The hard boiled yolk caused the egg to bounce like a ball and the raw yolk did not bounce.