How an egg becomes bouncy

WALT: For the science fair at Ahipara school. We had to write about something to do with science. I wrote an explanation about how an egg becomes bouncy.


             How an egg becomes bouncy
Have you ever wondered how your science experiment in class worked? Or how a hard egg turns into a bouncy rubbery egg? Have you ever wondered how an egg becomes bouncy?

The shell of an egg is called calcium carbonate. When you pop it in vinegar bubbles appear. The calcium carbonate in the shell has a reaction to the acid in the vinegar. The calcium carbonate then produces carbon dioxide.

How to turn an egg bouncy. Carefully put in the raw egg in a cup of white vinegar. After 1-3 days the shell will be nearly dissolved. Take it out of the cup and rinse it under tap water. Now you can test if it is bouncy.

The shell dissolves because of the vinegar. The vinegar is a weak acid. The shell is made of calcium carbonate which makes a chemical reaction when the egg and vinegar meet. The chemical reaction turns the calcium carbonate into carbon dioxide. That's why there would be some bubbles. Now you know how an egg becomes bouncy.
By Poppy