Question

A pot of water is heated on the stovetop. The water molecules closest to the burner rise in the pot when they gain thermal energy. In 1-2 sentences explain why the water rises. Include the property of the water that is changing as it is heating as well as the change in kinetic energy. (2 points)

Answer 1

The water rises because as it gains thermal energy, the water molecules near the bottom of the pot begin to move faster and have increased kinetic energy. This increased kinetic energy causes the water molecules to expand and become less dense, leading them to rise to the top of the pot.