A part of water is being heated on the stove top the water molecules closest to the burner rise in the pot when the gain thermal energy and wanted to send it, explain why the water rises
The water molecules closest to the burner gain thermal energy because the burner produces heat. When the water molecules gain thermal energy, their kinetic energy increases. As a result, the water molecules move faster and spread out.
This increase in kinetic energy also causes the water molecules to become less dense. Less dense substances float on top of denser substances. So, as the water molecules gain thermal energy and become less dense, they rise to the top of the pot.
In addition to the increase in kinetic energy, as the water molecules at the bottom of the pot gain thermal energy, they start to expand. Since liquids are relatively incompressible, this expansion causes the water at the bottom to occupy more space. As a result, the water level in the pot rises.
Therefore, the water rises in the pot because the water molecules closest to the burner gain thermal energy, become less dense, and expand. This phenomenon is known as convection, where hot fluid rises and cold fluid sinks due to differences in density.