Science Expirement Egg into Rubber

One fun project that I did with the kids to help them learn fun science was to turn an egg into a rubber ball. What happens is that the egg is soaked in vinegarmaking the shell is made rubbery  


•hard-boiled egg


•glass or jar, big enough to hold the egg

•vinegar

Turn the Egg into a Bouncy Ball

1.Place the egg in the glass or jar.

2.Add enough vinegar to completely cover the egg.

3.Watch the egg. What do you see? Little bubbles may come off the egg as the acetic acid in the vinegar attacks the calcium carbonate of the eggshell. Over time the color of the eggs may change as well.

4.After 3 days, remove the egg and gently rinse the shell off of the egg with tap water.

5.How does the boiled egg feel? Try bouncing the egg on a hard surface. How high can you bounce your egg?

6.You can soak raw eggs in vinegar for 3-4 days, with a slightly different result. The eggs shell will become soft and flexible. You can gently squeeze these eggs, but it's not a great plan to try to bounce them on the floor.