COLUMBUS, Ohio (WCMH) — Storm Team 4’s meteorologist Liz McGiffin caught up with Joe Wood, Director of Education Interactions and Performances at COSI, to talk about air pressure.

Joe showed some examples how air can expand when the pressure is changed by using marshmallow candy, a toy and a vacuum chamber. They also explained how air pressure plays a role in creating weather patterns.

You can watch the demonstration in the video player above.

For more information about COSI, look into exhibits that are currently open, or check when they are open, you can visit

Check out some other experiments and demonstrations below:

New Pterosaurs exhibit coming soon

Doc McStuffins and Ferret Fawcett

Cloud Experiments

Tesla Coil Lightning Show

Tornado in a Bottle

Build Your Own Iron Man Hand