If you have a boy, he’ll love this activity! Little boys, interested in airplanes, will enjoy learning about Bernoulli principle for kids.
Explain Bernoulli’s Principle For Kids
The Bernoulli’s Principle, which says that increased air speed produces decreased air pressure, helps to explain the lift produced by the wings of an airplane.
Bernoulli Bag Science Fun Kit w/5 Experiments, by Tedco
The wing is designed so that the air moves more rapidly over its upper surface than its lower surface, thereby decreasing pressure above the wing. At the same time, the pressure below the wing increases. This difference between the decreased pressure above and the increased pressure below produces lift.
In order to better understand this principle, children can perform an experiment with air pressure.
A simple experiment for this is to use a common, ordinary piece of paper, hold it in your hand just a few inches from your mouth with the paper pointing straight out in front of you and blow. Before you or your child does this be sure to ask them what they think is going to happen.
Because you are increasing the speed of the air over the paper, the pressure above the paper decreases. The higher pressure below the paper pushes up and causes the paper to rise. If the paper didn’t rise, experiment with how you are holding it in front of your mouth. You need the air to “catch” the top of the paper.
Air Pressure For Kids Explained
To help your child better understand the science of the wing you can conduct the following experiment.
You will need:
- Two Balloons
- A ruler
Pop! Air and Water Pressure (TIME FOR KIDS® Nonfiction Readers)Blow up the balloons and tie each one to a string, then tie the balloons on the ruler a few inches apart. (Sometimes it helps to add a tiny bit of water inside the balloon before blowing it up.) Hold the ruler up so that the balloons hang freely. What do you think will happen if you blow in between the balloons? Try it and see!
Most people are a bit surprise when the balloons move closer together! The fast moving air that you blow between the balloons lowers the air pressure between the balloons. Both balloons are moving to the area where there is less pressure, or closer together! This is demonstrating the Bernoulli principle.
This is similar to what happens with airplane wings. The curved surface of the wing causes the air to move faster on the top of the wing causing the wing to move towards the lower pressure, or up.
See Bernoulli’s Principle in Action
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