Second Grade
Worksheets
How Does Soap Make Bubbles?
Soap and water make a sticky film. To my surprise, it is very strong! When I blow air into the film, it pushes the film outward. The sticky film seals itself. It makes a ball or sphere. The air is trapped inside. The sticky film has something called surface tension.
Each part of the film holds on tight to the part next to it. This surface tension makes the bubble seal itself. It gives the bubble its shape (like a ball or sphere). It gives it strength. If more air is blown into the bubble, the film stretches thinner and thinner. The bubble grows bigger and bigger. If you blow gently, the bubble may get very big. If you blow hard, the bubble may pop!
