One example Dr. Jeff gave for convection was the heating of a pot of water on a stove. He explained that when the bottom of the pot is heated, the molecules near the bottom gain energy and start moving faster. As a result, they become less dense and rise. This creates a current of hot water that carries heat to the surface. The cooler water near the surface then sinks down to the bottom and the process repeats, causing the heat to be transferred throughout the pot.
