4C Change of State

Drinking Bird

Catalog: 
4C31.30A
Location: 
Wet the bird's beak and watch him drink. As the water evaporates off of the beak, it condenses the gas inside. This causes the amount of liquid in the bird to increase and rise, throwing it off balance and dunking its beak in the water again. As the liquid in the bird changes back into a gas the bird rises and the process repeats.

Drinking Bird - Video

demonstration image
Catalog: 
4C31.30B
Location: 
3_1
Video Encyclopedia :Standard drinking bird. Includes animation.

Pulse Glass (Hand Boilers)

Catalog: 
4C33.50
Location: 
Be1
Pulse glass - change of state(2 spheres w/fluid). We have three Pulse Glass devices, two of which are smaller and filled with a colored liquid ideal for hands-on outreach programs