What is conduction?

What is conduction?

• A. Heat transfer through the air by waves
• B. The measure of how hot something is
• C. The energy transfer by waves or radiation
• D. The transfer of heat through direct contact between substances

Answer: (D)

Conduction is heat transfer through direct contact between substances. When a warmer object touches a cooler one, its particles have more energy and collide with the particles of the cooler object, passing some of that energy along. This transfer happens from the hotter area to the cooler area and continues until both objects reach the same temperature. In solids, particles are tightly packed, so energy moves quickly; metals are especially good at conducting because free electrons can carry energy rapidly from hot to cold spots. A common example is a metal spoon getting hot when left in hot soup—the heat moves into the spoon through contact. Heat can also move in other ways, like by radiation, which involves energy traveling through waves, or simply by measuring how hot something is, which isn’t a method of transfer. Conduction, by contrast, is specifically about transfer through direct touch.

Conduction is heat transfer through direct contact between substances. When a warmer object touches a cooler one, its particles have more energy and collide with the particles of the cooler object, passing some of that energy along. This transfer happens from the hotter area to the cooler area and continues until both objects reach the same temperature. In solids, particles are tightly packed, so energy moves quickly; metals are especially good at conducting because free electrons can carry energy rapidly from hot to cold spots. A common example is a metal spoon getting hot when left in hot soup—the heat moves into the spoon through contact. Heat can also move in other ways, like by radiation, which involves energy traveling through waves, or simply by measuring how hot something is, which isn’t a method of transfer. Conduction, by contrast, is specifically about transfer through direct touch.