Did you know that you can use science to determine if an egg is hard boiled or raw (without cracking the shell of course)? It’s true! Just spin the eggs on a hard surface and observe what happens next.
Bonus, this experiment also comes in handy if you can’t remember which eggs in your fridge are hard boiled and which ones aren’t.
- Two Raw Eggs
- One Hard Boiled Egg
Step 1 – Prepare a bowl of 3 eggs, 2 raw eggs and 1 hard boiled egg.
Step 2 – Take one egg out of the bowl and spin it on the table. Observe what happens. Does the egg continue spin or does it stop?
Helpful Tip: It is important to spin the egg on a hard flat surface.
Step 3 – Next, repeat with the other two eggs. Observing the behavior each time. One of the eggs behaved differently than the other two. This is the hard boiled egg.
How Does the Experiment Work?
While the two eggs look and feel the same, there is a big difference in what’s inside the eggs. Inside the raw egg, the egg white and egg yolk are fluid and can move around inside the shell. Inside the hard boiled egg however, the egg white and egg yolk are solid and do not move around inside the shell.
When you spin the hard boiled egg, everything moves together and the egg will continue in a smooth spinning motion. However, when you spin the raw egg, the fluid inside moves around and cause the egg to wobble and stop spinning.
More Science Fun
Enjoyed this egg-citing experiment? Then you’ll want to try your hand at these other egg science experiments.
- Egg in a Bottle – Use a little science magic to get the egg into the bottle without touching it.
- Floating Egg – Eggs naturally sink, but we make them float. Find out how and then give it a try.
- Bouncy Egg – Remove the shell from a raw egg and make it bounce!
I hope you enjoyed the experiment. Here’s some printable instructions