A thunderstorm in South Africa The weather on Earth happens because of the evaporation and condensation of water, and because of the spinning of the earth and the tilt of the earth on its axis. Does it [...]
Hot air balloon - hot air rising is what causes wind Hot air is lighter than cold air When something is hot, its molecules are farther apart than when it is cold. When air [...]
Making your own hot air balloon (Thanks to American Aircraft Modeler) How to make a hot air balloon You can make your own tiny hot air balloon to see how [...]
Kongming's Light, made by kids at Laurelhurst School, Portland Oregon Hot air rises Scientists in China were early leaders in the investigation of hot air and how you could use [...]
