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 Maths products |
Geometric bubble films
Instructions
1. Pour the bubble mix down the sides of the bucket to avoid making small bubbles. 2. Connect pipecleaners together to form a cube ... i.e. 6 sides. 3. Dip the cube into the bubble mix and carefully withdraw it... is there a cube shaped bubble inside? 4. Try making tetrahedron (4 sides), a octahedron (8 sides), and a dodecahedron (12 sides)! 4. Does the bubble shape match the shape of each frame... why?
You will need:
- Pipecleaners - Strong Bubble mix - Deep bucket - Somewhere you can get wet!
Bubble films are stretchy... scientists call this 'stretch' surface tension.
As bubbles are stretchy, they always try to shrink into a sphere shape, minimising surface area. Dipping the frame into the bubble mix traps air inside the frame. The bubble inside the frame tries to form a sphere but the bubble films connecting to the frames pull on the bubble on the inside. This creates a bubble with the same shape as the frame.  |
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