What is the ignition temperature range in air?

The ignition temperature range in air typically refers to the temperature at which a substance will ignite under normal atmospheric conditions. The correct choice indicates a range of 920°F to 1,120°F, which aligns with commonly recognized values for many materials and substances.

This range reflects the temperatures required for ignition where a sufficient amount of heat is provided to overcome the activation energy barrier of combustion. At or above the lower limit of 920°F, many combustible substances can start to burn, while the upper limit of 1,120°F represents conditions where the likelihood of ignition increases significantly.

Factors such as the material's chemical composition, the presence of oxygen, and environmental conditions can all influence exact ignition temperatures, but the provided range is well-supported by fire safety and materials science standards.