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, a round shape. ... Bubbles are round when they float free through air.

Why bubbles are round for kids?

This flat surface has the smallest surface area but with zero volume of air. ... This creates a surface tension or tightness in the bubble skin, and it tries to shrink the bubble into a shape with the smallest surface area for the volume of air in it. Thus it takes the shape of a sphere and we have round bubbles.

Can bubbles be different shapes?

Individual bubbles will always be round. You may have noticed in the bubble paper activity that bubbles are not always round when they touch one another. Indeed, when bubbles attach to one another, they can create all sorts of shapes.