Why are Bubbles Round?

Bubbles are often round because they are made up of a thin film of soap or water. The film is held together by surface tension, which is a property of liquids that causes the surface of the liquid to behave as if it were a stretched membrane. This surface tension causes the film to be drawn into the shape that has the smallest surface area possible.

For a bubble to form, air must be trapped inside the film of soap or water. When air is trapped inside the film, it pushes outward against the film, trying to escape. The surface tension of the film resists this expansion, causing the film to stretch and bulge outward. The film will continue to stretch and bulge until it reaches a shape that has the smallest surface area possible. This shape is a sphere, which is why bubbles are often round.

Bubbles can also take on other shapes depending on the surface they are resting on. For example, if a bubble is resting on a flat surface, it may become flattened into an oval shape. If a bubble is resting on a curved surface, it may become deformed into a more irregular shape.

In summary, bubbles are often round because they are made up of a thin film of soap or water that is held together by surface tension. The surface tension causes the film to be drawn into the shape that has the smallest surface area possible, which is a sphere. Bubbles can also take on other shapes depending on the surface they are resting on.