What term refers to the movement of heat by fluid or air?

The movement of heat by fluid or air is referred to as convection. This process occurs when warmer, less dense fluid or air rises while cooler, denser fluid or air sinks, creating a circulation pattern that effectively transfers heat throughout the space. Convection is commonly observed in various heating and cooling systems, where air or fluid circulates to distribute heat evenly. This contrasts with conduction, which involves heat transfer through direct contact between materials, and radiation, which refers to the transfer of heat through electromagnetic waves without the need for a medium. Sensible heat is a term that describes the heat absorbed or released by a substance that results in a temperature change without a phase change and is not directly related to the movement of heat through fluid or air.