Dr. Jeff provided an example of convection by explaining the process of boiling water on a stove. In this case, heat is transferred through convection. As the bottom of the pot comes into contact with the heat source (stove burner), the molecules gain thermal energy and begin to move faster. This causes the water at the bottom to heat up. Since hot water is less dense than cold water, the heated water at the bottom rises to the surface, carrying some of its thermal energy with it. This upward movement of hot water and downward movement of cooler water sets up a convection current. As a result, heat is transferred throughout the entire pot of water, leading to a boil.
