Additional Info

• ID Code: I2-41
• Purpose: Illustrate convection.
• Description:
  Heat one side of the tube, and the water will rise on that side by convection, carrying the powder, which makes the convection visible. To avoid overheating and destroying the apparatus, heat only for about ten seconds in a blast. Before beginning, rotate the entire apparatus so that the powder is uniformly distributed.

  A video camera may used to enlarge the action in the lecture halls.

  Background:

  The isolated heat source produces convection currents through the apparatus. Heated water rises up one side of the loop, drawing powder with it, while cooler water is drawn down the other side.

• Availability: Available
• Loc codes: I2