Do the classic “egg in a bottle” experiment.

You’ll need:

• a hard boiled egg, cooled and shelled


• a glass bottle with an opening slightly smaller than the egg


• hot tap water


• cold tap water

Test to make sure your egg does not fit into the bottle. Don’t push on it, as you don’t want to break the egg! Hold the bottle under the hot running tap water to heat it up. Dump any water down the drain, and place the egg on the bottle opening. Now place the bottle under running cold water, and hold it there. Watch what happens. The egg should get sucked into the bottle. Why did that happen?

Click on the Activity Button to download the Thermal Expansion and Contraction Assignment.