Interesting Facts About Bubbles
Bubbles are an incredible natural phenomenon that can teach us a lot about physics, geometry, and mathematics.
What Happens to Bubbles in Space?
Can You Freeze a Bubble?
When the temperature sinks below 5 degrees Fahrenheit, bubbles will begin to freeze.
A bubble’s shell is composed of a layer of water molecules surrounded by two thin layers of soap. Technically, a bubble will freeze below 32 degrees Fahrenheit like all water. The only problem is that bubbles tend to burst after a few seconds, so in order to see a bubble freeze, the temperature needs to fall to a temperature that will freeze water molecules more quickly.
So, will frozen bubbles last forever?
No… The air within a frozen bubble will slowly leak out, and the frozen shell will crumble under its own weight. Also, if you blow the bubble using your warm breath, the air will cool causing a drop in pressure which will collapse the bubble further.
Why Do Bubbles Burst?
The air pressure within the bubble is no longer equal to the pressure outside of the bubble. This could also be caused by variations in thickness of the material (water, soap, etc) creating the bubble.
If a hole is created on the surface of the bubble, the air pressure within the bubble will escape, and the water molecules — now with no force pushing from within — will collapse by folding back on its self.
Why Are Bubbles Round?
Scientists refer to bubbles as "minimal surface structures." This means that they always hold the gas or liquid inside of them with the least possible surface area. The geometric form with the least surface area for any given volume is always a sphere, not a pyramid or a cube or any other form.
But... when a normally round bubble is surrounded by other bubbles, it can be made to take on a seemingly odd shape. Here, a cube is surrounded by six other bubbles, it appears to be a bubble cube! If the surrounding bubbles are popped, though, the bubble in the center reverts to its natural "round" shape.