• This glass square helps to illustrate a convection current in a liquid. To observe this current, fill the apparatus with water and food coloring, then heat it at the bottom corner with low temperature heat source, such as a candle. Convection currents are then seen as the coloring is moved through the water in the glass tube, like the circulation of a hot water system. The heat source and support stand are not included.
• Made of quality borosilicate glass
• A great STEAM demonstration of convection currents in a liquid.

This glass square helps to illustrate a convection current in a liquid. To observe this current, fill the apparatus with water and food coloring, then heat it at the bottom corner with low temperature heat source, such as a candle. Convection currents are then seen as the coloring is moved through the water in the glass tube, like the circulation of a hot water system. The heat source and support stand are not included.