We left the egg in vinegar for 24 hours. Guess what? The shell turned soft! Can you see the wrinkle in the "shell?" This is what happened: Eggs contain calcium carbonate...that's what makes them hard. Vinegar is an acid. When the egg and vinegar combine, a chemical reaction takes place and a gas (carbon dioxide) is released. We saw the bubbles to show this! This chemical reaction kept happening until all the carbon in the egg was used up. All the carbon floated out of the egg in those little bubbles!
Now we are going to leave the same egg out for another day without the vinegar to see what happens. Stay tuned!
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