Have you ever made an eggshell disappear?
This is a great experiment, but does require some patience.
Keep in mind that eggs are very specialized animal cells and some of the structures are similar to a plant cells. Eggs have a cell membrane and a hard outer covering (similar to a plant cell’s cell wall).
You are going to use vinegar to cause a chemical reaction. What are the signs that a chemical reaction is occurring? BUBBLES. Scientists know that bubbles in a liquid either come from air escaping to the surface. This air was either trapped in the liquid to begin with or a chemical reaction has occurred. In this case, the vinegar reacts with the shell of the egg and causes the release of carbon dioxide.
There are all different versions of this experiment, but 24 hours was all my kids could last before getting the eggs out.
I am a big believer in the scientific method so we did an experimental egg and a control egg. Our question was, “ What will happen to an egg in vinegar?” . Our hypothesis was, “ An egg in vinegar will behave the same as an egg in water”. We were wrong!
As mentioned above, the vinegar reacts with the components of the shell and causes the shell to disappear. This leaves the membrane behind and you get a rubberized egg.
We played with them for a little while (over the sink) and even dropped it to watch it bounce, but eventually it broke. Leaving the membrane behind.
My kids LOVED this and we will be using this idea as part of our gift giving this season (more on that later). Have fun and use what you have around to explore the world!