Fun and easy science experiments for kids and adults.
Straw rocket launcher
Physics
Make a small rocket launcher out of a plastic bottle, two straws and some modeling clay. This experiment shows that air really is something and that air moves from high to low pressure.
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Video
Materials
- A 0.5 L (16.9 fl oz) plastic bottle
- 2 drinking straws, 1 wide and 1 slim (the wide must fit over the slim)
- Modeling clay
Warning!
Flying straws can injure eyes. Be careful.Step 1
Step 2
Step 3
Step 4
Explanation
When you squeeze the bottle, the air inside it is compressed - the air pressure becomes high. The air always moves from high to low air pressure when the road is clear, and in this case there is an escape route through the straw. On the way out to freedom, the air pushes on the plug of modeling clay and thus the rocket flies away.Experiment
You can turn this demonstration into an experiment. This will make it a better science project. To do that, try answering one of the following questions. The answer to the question will be your hypothesis. Then test the hypothesis by doing the experiment.- What happens if you squeeze harder?
- What happens if you change the angle of the launch?
- What happens if you change the height from which you launch?
- What happens if you use a bigger plastic bottle?
- What happens if you use slimmer straws?
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© The Experiment Archive. Fun and easy science experiments for kids and adults. In biology, chemistry, physics, earth science, astronomy, technology, fire, air and water. To do in preschool, school, after school and at home. Also science fair projects and a teacher's guide.
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© The Experiment Archive. Fun and easy science experiments for kids and adults. In biology, chemistry, physics, earth science, astronomy, technology, fire, air and water. To do in preschool, school, after school and at home. Also science fair projects and a teacher's guide.
To the top
