What is conduction in the context of heat movement?

In the context of heat movement, conduction refers specifically to the transfer of heat through direct contact between materials. This process occurs when molecules in a warmer object collide with molecules in a cooler object, transferring kinetic energy and raising the temperature of the cooler material. For example, if you touch a hot stove, heat is conducted from the stove to your hand, leading to a sensation of warmth.

This type of heat transfer is highly effective in solids, particularly metals, because their closely packed molecules allow for efficient energy transfer. Conductive heat transfer plays a significant role in various settings, such as building insulation and maintaining thermal comfort in structures.

Understanding conduction is crucial for professionals working with energy efficiency and air barriers, as it can impact the design and performance of building envelopes. Other choices, while related to heat transfer, describe different mechanisms: air currents refer to convection, radiation involves heat transfer through electromagnetic waves, and mechanical systems usually pertain to forced air systems.