When dry ice is placed in warm water it sublimes very quickly forming a large amount of carbon dioxide gas. When a bubble is placed over this the bubble grows from the pressure.
- a beaker ~3/4 full of warm water
- a dry ice pellet and tongs
- strip of cheesecloth that has been soaked in soapy water (a Sparkleen solution used to clean in labs, or a bubble solution from another demo will work)
1. Place the dry ice into the water
2. Drag the cheesecloth strip over the top of the beaker so it forms a film
Food coloring in the water makes it easier to see.
Dry ice is a cryogenic hazard and should be handled carefully and goggles worn at all times.
“Awesome Dry Ice Experiments.” Steve Spangler Science. Accessed 15 Jul 2011.