Convection Currents video

The relationships between heat, volume, and density gives rise to convection currents as demonstrated following video. Please set this up and do it yourself to give kids first-hand experience. Emphasize that because of differential heating by the sun, such currents take place in the atmosphere, giving rise to winds, and in oceans giving rise to ocean currents (and also in the Earth’s mantle giving rise to continental drift, albeit over millions of years). Please post kid’s questions and comments.