For this Summer of Science experiment we’re demonstrating how low pressure is created and its effects.
- 2 balloons
I think the picture explains the set up, but just in case…Blow up the balloons and tie each of to a piece of string and attach to a pencil or other stick.
Have your kids gently blow between the two balloons and you’ll notice that they’ll move together.
The balloons move together because the force of your breath reduces the air pressure between them and the air pressure outside them pushes them together. During a tornado a low pressure area is created and houses have been known to explode when the air pressure inside the house is greater than that outside it.