What are pressure differences?

Pressure differences are when one place has more push than another place, and that push makes things move.

Imagine you're blowing on two balloons. One balloon is full of air from your mouth, and the other isn’t touched at all. The balloon with air feels pushy because the air inside it is pushing against the rubber. That’s like having more pressure in one spot than another.

Think about a balloon animal, maybe a dog or a frog. When you blow into it, you're creating a pressure difference: the air inside pushes out, and the balloon changes shape. If you let some air out, the pressure inside goes down, and the balloon gets smaller.

It’s just like when you open a soda bottle. The air outside is pushing in, and the air inside was pushing out, but once you open it, the pressure difference lets the fizzy drink go whoosh up!

Or think of your toy car: if you let some air into one side and not the other, the air pushes harder on one side than the other, making the car move. That’s how pressure differences make things go, just like in a balloon or a soda bottle! Pressure differences are when one place has more push than another place, and that push makes things move.

Imagine you're blowing on two balloons. One balloon is full of air from your mouth, and the other isn’t touched at all. The balloon with air feels pushy because the air inside it is pushing against the rubber. That’s like having more pressure in one spot than another.

Think about a balloon animal, maybe a dog or a frog. When you blow into it, you're creating a pressure difference: the air inside pushes out, and the balloon changes shape. If you let some air out, the pressure inside goes down, and the balloon gets smaller.

It’s just like when you open a soda bottle. The air outside is pushing in, and the air inside was pushing out, but once you open it, the pressure difference lets the fizzy drink go whoosh up!

Or think of your toy car: if you let some air into one side and not the other, the air pushes harder on one side than the other, making the car move. That’s how pressure differences make things go, just like in a balloon or a soda bottle!