Why does soap bubble fly in the air?

I always like to look at simple things that we take for granted in life and examine them, and ask questions. There is always someone useful to learn. ( Note that I might be saying things you said you already realized and knew, but I'm just going to reiterate it first). read more

Air has a certain density, and assuming the air in a bubble has the same density as the air outside the bubble, then you would expect it to not rise or decend because the densities are the same. For non-bubbly air, this is true. So the air in an ideal envirnment does move around too much vertically. read more

A bubble and the air trapped inside of it are both very light. In order to float, the bubble hitches a ride on a gas that is slightly denser than the air trapped inside of it: carbon dioxide! All objects — solids, liquids and gases — are made of molecules. read more