Which term describes the tendency of gases in an enclosed space to form in layers according to their temperature?

The correct response to the question is the term that refers to the stratification of gases based on temperature, which is known as thermal layering. This phenomenon occurs in an enclosed space where warmer gases are less dense and will rise, while cooler gases are denser and sink. As a result, different layers of gas can develop, creating zones of varying temperatures within the same space. This stratification can significantly influence fire behavior, particularly in regards to heat release and smoke movement, making it crucial for fire service professionals to understand when combating fires.

Thermal equilibrium describes a state where temperatures are uniform throughout a space, meaning there are no significant variations in temperature. Thermal temperance is not a recognized term in the context of gas behavior or fire science. Rollover refers to a specific fire condition where heated gases accumulate at the ceiling and ignite, but it does not describe the layering process itself. Understanding these terms and their implications helps firefighters make informed decisions during operations.