The Egg in the Bottle experiment shows kids how pressure and temperature relate to each other. Basically, you get a hard boiled egg, bottle and matches to watch the egg slip into the bottle.
Here's what you'll need:
- Hard boiled eggs with the shell removed
- Vegetable Oil
- Newspaper or paper towels
- Bottle with an opening a little smaller than the egg.
Although this experiment seems simple, it did take us a few tries to get it just right. Our first lesson learned was to boil more than a couple of eggs. The experiment is so much fun, the kids want to do it over and over again.
So, you'll want to take the shells off of the egg, then lightly cover it in vegetable oil. The vegetable oil isn't necessary; however, it will make the egg slide in better.
Next, get your clean bottle, such as a Gatorade bottle or a juice bottle. We prefer the juice bottles, like the Ocean Spray bottles, because they just seem to work better.
Most sites will tell you to light the match and drop it in, but we found it is easier to roll up some newspaper or paper towels to light on fire and drop into the bottle. Wait a couple of seconds, then place the egg on the mouth of the bottle. The egg will then be sucked down into the bottle.
Pay attention because it will happen very quickly. Also, it doesn't hurt to have a cup of water handy just in case.
The first time we did this experiment, my kids said there was no way the egg was going to fit into the bottle because it was just too big. They were absolutely amazed the egg slid into the bottle, and we just had to do it over and over again.
I hope your children enjoy this little experiment as much as we do.