What does an aircraft wing, birds and perfume puffer have in common?
Answer: They all use the power of Bernoulli Pressure.
Explore how the movement of air and Bernoulli’s Principle can be used in a FUN way with our Chatterbox tubes.
Several Chatterbox tubes
1, 2 or more mini-scientists (you and some friends)
Some medium elastic bands
Ask your friends to try and blow up as much of the Chatterbox tubes only using 6 breaths. Make sure they take their time and not blow too fast. You don’t want them to faint.
After they blow their 6 breathes, grasp the tube (to keep the air inside) and compare the amount of air they actually ‘blew’ into the tubes.
Now for your turn!
Open the end of the tube wide and pace it about a hand width away from your face.
Now, breathe in to fill your lungs and then blow into the tube like you are blowing out candles on a birthday cake.
Quickly grasp the tube with your hands.
WOW, super breath!
Challenge them to see who can blow the tube up the most with ONE breath.
Watch the videos below to explore the science behind this ‘Magical Science’ trick and how it relates to planes and bird wings.
Check out the ‘Wacky Science’ video of this experiment and ‘What’s Going On’ series link. They are currently ‘In Production’, so check back soon…..
Wacky Science Ep
What's Going On?
A Swiss scientist put forward a theory over 200 years ago that said something like this:
Â “Fast flowing fluids create a LOW pressure region”
This scientist was called Daniel Bernoulli and his theory was called The Bernoulli Principle. It can be used to explain many things such as how planes & birds fly, how tennis balls get their topspin and MORE!
In this experiment, we are blowing quickly into the Chatterbox Tube to create a fast flowing region of air. This fast flowing region of air creates a LOW air pressure region (L) inside the tube compared to the air outside of the tube (H).
The air moves from the high pressure region (H) towards the low pressure region (L) causing the tube to fill up quickly with only ONE breath!
If you would like
– more details,
– pictures of the second half of the experiment
– information on how to investigate this further
– links to everyday examples
– management hints & teaching pointers (5P Teacher develpoment program)
Â ….. then why not subscribe to one of the following
(1) Crazy science Club
(2) 5P Teacher Training course called ‘Looney Lab Â Classroom Creations‘
Or you can purchase the ‘Bright Sparkes Guide’ of this demonstration only ($2.50) which has:
- HD pictures of experiment steps
- Detailed explanation of science
- Mini-challenge section (another experiment)
- Making it a â€˜Scientific Methodâ€™ experience
- Graphing opportunities
- REAL links and descriptions to everyday examples of concept.
- High pressure: A region of air that has a lot of air particles (molecules) in a specific area.
- Low Pressure: A region of air that has low number of molecules in a specific area.