What process involves the movement of heat through a fluid or air?

The process involving the movement of heat through a fluid or air is known as convection. This transfer of heat occurs as warmer fluid or air becomes less dense and rises, while cooler, denser fluid or air sinks. This cycle creates a continuous movement, facilitating the transfer of thermal energy throughout the fluid or air.

In contrast, conduction refers to heat transfer through direct contact between materials, where heat moves through a solid substance. Radiation involves heat transfer through electromagnetic waves, allowing heat to move through a vacuum without the need for a medium such as air or fluid. While superheating describes a condition where a liquid is heated above its boiling point without actually boiling, it does not define a heat transfer process.