Which term corresponds to the transfer of heat through a solid via direct contact with another object?

Which term corresponds to the transfer of heat through a solid via direct contact with another object?

• A. Draft Curtain/Curtain Board
• B. Parapet Wall
• C. Fire
• D. Conduction

Answer: (D)

Conduction is the transfer of heat through a solid by direct contact. When a hotter object touches a cooler one, the molecules and electrons at the interface collide and share energy, creating a heat flow from the high-temperature area toward the low-temperature area. This happens within the solid and across touching surfaces, and metals transfer heat especially well due to free-moving electrons. In a fire scenario, conduction explains how heat moves through walls, studs, or objects in contact, influencing how quickly adjacent materials may ignite or fail. The other terms describe protective devices, structural features, or the fire event itself, not the mechanism of heat transfer through solids.

Conduction is the transfer of heat through a solid by direct contact. When a hotter object touches a cooler one, the molecules and electrons at the interface collide and share energy, creating a heat flow from the high-temperature area toward the low-temperature area. This happens within the solid and across touching surfaces, and metals transfer heat especially well due to free-moving electrons. In a fire scenario, conduction explains how heat moves through walls, studs, or objects in contact, influencing how quickly adjacent materials may ignite or fail. The other terms describe protective devices, structural features, or the fire event itself, not the mechanism of heat transfer through solids.