All fluids exert pressure like the air inside a tire. The particles of fluids are constantly moving in all directions at random. As the particles move, they keep bumping into each other and into anything else in their path. These collisions cause pressure, and the pressure is exerted equally in all directions. When particles are crowded together in one part of their container, they quickly spread out to fill their container. They always move from an area of higher pressure to an area of lower pressure. That’s why air entering a tire quickly spreads throughout the tire.
Bob was hoping to help the kids cool off on a really hot day. He decided to fill some water balloons for them to throw. As he was filling the balloons he watched the water run from the faucet and spread out inside each balloon. The balloons quickly went from flat to fully expanded. When Bob was almost done filling the balloons his wife asked him a question he looked away from the balloon he was filling to talk to her. All of a sudden Bob heard a popping sound and felt water splashing all over his shirt.
Di9d increasing or decreasing pressure cause the balloon to pop?