Question

Based on the information in Conducting Heat, why is a coat necessary to keep warm outside on a cold day?

A. The insulation will warm up the body.
B. The insulation will move cold air away from the body.
C. The insulation will keep the cold air from traveling to the body.
D. The insulation will block the heat from traveling away from the body.

Answer 1

A coat is necessary to keep warm as it provides insulation, which blocks heat from leaving the body, effectively reducing heat loss in cold environments.

Step-by-step explanation:

Based on the information provided, a coat is necessary to keep warm outside on a cold day because the insulation will block the heat from traveling away from the body. Insulation serves to limit the conduction of heat; it does this by trapping air, since air is a poor conductor of heat. This effectively reduces heat loss from the body in cold conditions. Wearing a coat with good insulating properties, like those that have materials such as fur, fiber, or fiberglass, helps maintain body temperature by utilizing air's low conductivity to create a barrier against the cold.