Which statement best describes the effect of wearing a hat on an infant's heat loss?

Which statement best describes the effect of wearing a hat on an infant's heat loss?

• A. Convection is reduced
• B. Radiation is reduced
• C. Evaporation is reduced
• D. Conduction is reduced

Answer: (A)

Wearing a hat helps preserve an infant’s body heat mainly by reducing convection. The head is a large source of heat loss in newborns, and when air can flow freely around the scalp, warm heat is carried away efficiently by cooler surrounding air. A hat traps a thin layer of warm air close to the head, creating insulation that lowers the rate of heat transfer to the environment through convection. While radiant heat loss and evaporation can play roles too, the dominant effect of a hat is to cut down convective heat loss. That’s why covering the head is an effective and common measure to help maintain an infant’s core temperature.

Wearing a hat helps preserve an infant’s body heat mainly by reducing convection. The head is a large source of heat loss in newborns, and when air can flow freely around the scalp, warm heat is carried away efficiently by cooler surrounding air. A hat traps a thin layer of warm air close to the head, creating insulation that lowers the rate of heat transfer to the environment through convection. While radiant heat loss and evaporation can play roles too, the dominant effect of a hat is to cut down convective heat loss. That’s why covering the head is an effective and common measure to help maintain an infant’s core temperature.