What is a bubble?
The definition of a bubble is a thin sphere of liquid enclosing air or another gas. Most bubbles are made out of air, but can also be enclosing another gas such as Carbon Dioxide. The film that encloses this gas is made out of three layers. The first and last layers are soap, with the second being a very very thin layer of water. The molecules of soap are built so that its polar or hydrophilic head faces the water, and its other end (hydrophobic hydrocarbon) facing away from the water. This means that no matter what shape a bubble originally is, it will try to become a sphere.

How do bubbles disappear?
The air inside bubbles is under compression from the surface tension of the film on the outside of the bubble. As the air escapes from the bubble, the bubble shrinks at a constant speed until it collapses. Gravity pulls the film from the top of the bubble, helping air escape. When the film becomes too thin to support the bubble, it bursts.

How are bubbles made?
Bubbles are made by blowing air into a film of soapy water. The basic ingredients for liquid bubble solution are: soap, glycerin and water. The glycerin makes the bubbles more durable or helps them stay together and not break apart.

Why are bubbles spherical?
The sphere is a shape that minimizes the surface area of structures. This also means that being a sphere requires the least amount of energy, so therefore it is easier for bubbles to retain a spherical shape. The spherical shape of bubbles also maximizes surface tension, making the bubble use all of its energy in the most efficient way.

What happens where two or more bubbles meet?
Much like the reason bubbles are spherical when two bubbles meet, they merge and try to have the least surface area possible to use as less energy as possible. The sizes of the bubbles effects the way that they merge. If the bubbles are of the same size, then the section of the bubble that merged together will be flat. If one of the bubbles...

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