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5 Answers
- Miss MouseLv 61 decade agoFavorite Answer
Cuz if they didn't it would be no fun for kids to blow them!
- connieLv 71 decade ago
Bubbles floating in air or in water?
The skin created by the surface tension contains/imprisons air molecules which fly around in all directions. These molecules due to their friction cause the air inside the bubble to heat very slightly and expand becoming less dense than the outside air. Also because of their (the molecules) movement (pressure) the skin is stretched out slightly but remains spherical and whole due to the surface tension. This means that per volume there is actually less air inside than outside..........thus the density is lower.
Or did you want a simpler answer?
- Anonymous1 decade ago
because its lighter than oxygen.
Source(s): science class - How do you think about the answers? You can sign in to vote the answer.
