Physics and chemistry bubbles form, and coalesce, into globular shapes, because those shapes are at a lower energy state for the physics and chemistry behind it, see nucleation.
Accompanied by small plastic wands, a bubble pipe, or more complicated type of apparatus such as bubble trumpets, bubble airplanes, bubble lawn mowers, and more, which appear in the market each year (see figure 2) most of the devices for making soap bubbles do not work well or produce the results promised on package descriptions. Bubbles eventually burst once the layer of water evaporates, but adding glycerin lengthens the life span of bubbles glycerin forms weak hydrogen bonds with water, delaying evaporation dry air or dry hands can still burst a bubble, however.
The chemistry (and a little physics) of soap bubbles this is a book in progress it is a summary of my studies, experiments and activities with soap bubbles.
Bubbles provide the opportunity to study science concepts such as elasticity, surface tension, chemistry, light, and even geometry your students can engage in processes such as observation, experimentation, investigation, and discovery, simply by studying bubbles.
One interesting device is the bubble foamer, a plastic tube with holes in it, similar to a straight flute, covered with cloth (see figure 6) when dipped in soap solution, the pores in the cloth act as little bubble loops producing a foam of bubbles figure 1 a bubble loop constructed from string and soda straws. A bubble is a thin film of soapy water most of the bubbles that you see are filled with air, but you can make a bubble using other gasses, such as carbon dioxide the film that makes the bubble has three layers a thin layer of water is sandwiched between two layers of soap molecules.