What You Need:
- Raw eggs - 4
- With the help of an adult, boil 2 eggs in water for 10 minutes until they are hard boiled.
- ¨Cool the eggs under running water and let them cool completely.
- Put 2 raw eggs into a bowl with the boiled eggs. Ask a friend to sort the cooked eggs from the raw ones without cracking them.
How do you segregate the raw eggs?
Spin each egg on its side one at a time. Let the egg spin for a moment, then stop it and immediately release it. The raw eggs will start to spin again (just a little), but the cooked ones won't.
The raw egg starts to spin again because it has liquid yolk and egg white inside. Even when you stop the egg from spinning, the liquid inside keeps turning because it is not attached to the shell.