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| Pulse (Palm) Glass - Ideal for demonstrating that vapor pressure increases when temperature increases. Two glass bulbs are connected with a glass tube, and contain a colored, volatile liquid. Holding one of the bulbs in your hand causes the evaporation of a portion of the liquid that forces the liquid to the other bulb. |
Awesome, right?
Or this:
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| Anemometer - This working model shows the principle of wind velocity measurement. Four plastic cups on arms are mounted on a smooth turning axle. The apparatus is sensitive to the slightest breeze, even as low as 2 mph; wind speed can be quantitatively determined by counting the rotations. |
So cool! If you want to check out all sorts of science education supplies, check out Al's merch here.
