Lost in Space

Do you ever feel like you want to get lost in space? Well now you can when you make your own balloon rocket.

The scientific principles involved are the uses of pressure to cause movement. In other words, you are learning how to make a rocket fly.

Materials:

- a balloon
- a paper bag
- string
- a straw
- sticky tape
- a tape measure

Procedure:

Decorate your paper bag so that it looks like a rocket. Attach the paper bag to a straw. Put the straw through the string that is stretched tight across the room. Put the balloon in the bag and blow it up.

Ready? Let it go!

What is Happening?

This balloon rocket experiment uses the pressure difference between the gas inside the balloon to that outside the balloon. The gas inside moves towards the area of lower pressure. The gas pressures are moving towards an equal state; technically this is called moving toward equilibrium.
This experiment is a good demonstration of the ability of pressurized air to make an object move.