How to make a spinning "snake"
Observe safety precautions when working with fire. Conduct this experiment away from flammable objects and liquids.
- glass with salt;
- bamboo rod;
- a sheet of paper;
Make a "snake" by drawing a spiral on a piece of paper and cutting it out with scissors. Make a stand for the “snake” by inserting a needle into a bamboo rod, then putting the contraption in a glass with salt for stability. Place a candle in the glass. Place the “snake” on the stand and light the candle. Watch the “snake” spin!
The candle flame heats the air, which expands, becomes less dense, and rises. This creates a convection stream of warm air, which sets the “snake” in motion. For the experiment to succeed, the snake must be long enough, spirally shaped, not light enough to be blown away, and not heavy enough to have trouble rotating.