Create a cushion of carbon dioxide gas to float some soap bubbles on. Many concepts can be demonstrated through this activity:

• Carbon dioxide gas is more dense than air
• Bubbles are semipermeable, allowing only carbon dioxide to diffuse in, but not the air to escape out
• Sublimation from a solid to a gas

Concepts

states of matter, matter, buoyancy, density, permeability, sublimation

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Additional Tags

buoyancy, permeability, density, state of matter, sublimation, science

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Pros

• Everybody enjoys learning by using dry ice
• Can be used in a variety of lessons

Cons

• None