# How to Make Crazy Levitating Bubbles

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Another of my Halloween Demonstrations. This simple but amazing video explains how everyday bubbles can float on a magic layer of air. It all has to do with density of air and some dry ice.
Air is less dense than CO2. It is mostly N2 and the bubbles magically float of the CO2.

Music: Kevin MacLeod

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## 19 Discussions

I've never gotten it to work with a paper boat, but it can be done with a boat made of tinfoil.

No, the paper boat would be heavier than any gas. As he said in the paragraph under the video, this works because the regular air (nitrogen, oxygen and the rest of the mix we breathe) in the bubbles is lighter than CO2 and the soap bubble encapsulating the air isn't heavy enough to counteract this difference. You could do this with about any heavier-than-air (denser) gas, but CO2 is the easiest to obtain in the form of dry ice. Nice touch at the end dowsing the candle by pouring the CO2 on it.

The Saran Wrap would still be too heavy from its thickness. What is the thickness (and resulting mass) of the soap bubbles? Compare that to any other material you might consider using to attempt this feat.

Hey, just so you know, although paper MAY be too dense for this, aluminum foil would work very well. Don't forget that the net upward buoyancy force is equal to the magnitude of the weight of fluid displaced by the body. This means that if the boat can displace enough air, it can easily float. The metal in ships is far denser than the ocean around it yet they still float. I say give it a shot bigcheeze!

you just need to find something less dense then co2, like soap bubbles, you should try that!

Your statement is incomplete. More complete would be "a container of X volume of air will support Y weight floating on sulfur hexafluoride."

To demonstrate your point, how would you go about making sulfur hexafluoride?

To demonstrate this compound you pointed out, I found this video:

Though they didn't say why in the video, as with CO2 you want to purge this heavier-than-air gas from your lungs if you inhale it, or you'll asphyxiate.

How bout reading the description:

sulfur hexafluoride is more dense then the surrounding air

It doesn't even mention co2...