Convection

Convection

Convection is the transfer of heat through fluids (liquids or gases) caused by the movement of molecules. It occurs when warmer, less dense parts of a fluid rise while cooler, denser parts sink. This movement creates a circular flow called a convection current. You can observe convect...

Imagine a pot of water on a stove. As the heat turns up, tiny bubbles start rising from the bottom.

Why does all the water in the pot get hot when only the bottom is being heated?

This happens because of convection, the movement of heat through liquids and gases as warm particles rise and cooler particles sink.

When you boil wa...