Which method describes the transfer of heat by the movement of heated fluids or gases?

The method that describes the transfer of heat by the movement of heated fluids or gases is convection. This process occurs when warmer fluid or gas particles rise due to their lower density, while cooler, denser particles sink, creating a continuous circulation throughout the fluid or gas.

In fire protection and firefighting contexts, understanding convection is crucial because it can significantly impact fire behavior and the spread of heat within a structure. For instance, smoke and hot gases generated by a fire will rise to the ceiling and can spread horizontally, affecting areas far removed from the fire source.

Knowing how convection works allows firefighters to anticipate the movement of heat and smoke, which is essential for effective fire attack strategies and ensuring the safety of occupants.