Cyclones, hurricanes and typhoons are all the same type of weather
feature; we just use different names for them depending on where they
occur on the globe.
They all have similar features such as:
– a circular movement of air that moves in the same direction as the Earth
– inward spiraling winds
Cyclones use differences in air pressure to create their ‘vortex’ of air movement.
We will be using the spinning effect of water to create ours!
- Attach the Cyclone Connector to the bottle with the water in it.
- Then attach the empty bottle to the other end.
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?
This easy experiment shows the power of vortex. Although the experiment is easy, the explanation of how the vortex forms is complex fluid physics.
It is a combination of gravity pulling the water down, momentum of the water moving in a circle (inside the bottle), air pressure differences between the upper bottle and lower bottle as well as surface tension of water.
– As you spin the bottle the water inside moves around, pushing against the sides of the bottle.
– This pushing against the bottle creates an opposite push against the water into the centre (called centripetal force…… for those bright sparks).
– Gravity pulls the water down and in the middle of the water a vortex starts to form.
– The water in the middle of the bottle spins faster than the outside of the bottle and the vortex gets bigger. (Similar to how ice skaters spin faster when they bring their arms into their body).
– As the water enters the lower section of the bottle, air passes upwards into the upper section of the bottle to equal air pressure.
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.