Which statement describes energy transfer by conduction, convection, and radiation?

• A. Conduction transfers energy through direct contact.
• B. Conduction is different from convection.
• C. Conduction uses waves to transfer energy.
• D. Conduction converts energy to matter.

Answer: (A)

Energy moves in different ways, and conduction is the process where energy transfers through direct contact between particles. When two objects touch, or when a hot region and a cooler region are connected by a solid, energy moves from the warmer area to the cooler area by collisions and vibrations of neighboring particles. For example, a metal spoon in hot soup gets warmer because the heat travels along the spoon through these particle interactions. The other ideas don’t fit the description: waves describe radiation, not conduction; saying conduction is simply different from convection doesn’t explain how energy moves; and energy isn’t turned into matter. So the statement that energy transfers through direct contact captures the essence of conduction.