Product Description
Video and lesson investigations on the topic of the diving bell. Key concepts include:
- The diving bell works on the same principle as an upturned glass of air pushed into water (see ‘Capturing Some Air’ and ‘Keeping Some Paper Dry’ lessons)
- As long as there is air in the diving bell the water cannot enter. The diving bell must be heavy enough not to rise to the surface.
- Getting a constant supply of fresh air into the diving bell is a problem.
- Eventually the air becomes contaminated by the breathing of the people inside and has to be changed.
- The first diving bell, designed by Edmund Halley, was a cone-shaped bell made of wood clad with lead.
- This bell was sturdy and heavy, both to keep the air in and to help keep the bell submerged.
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