conduction
The direct transfer of heat or electricity through a substance without movement of the material itself.
Conduction requires direct physical contact. It occurs at the molecular level as faster-moving, warmer particles collide with and transfer energy to slower-moving, cooler neighboring particles.
Word relationships
- transmission: Transmission is a general term for passing something along, whereas conduction specifically implies transfer through a stationary medium via molecular contact.
- insulation: Insulation is the prevention or resistance of heat or electrical transfer, directly opposing conduction.
Commonly confused with
- convection: Conduction transfers heat through direct contact within a stationary medium, while convection transfers heat through the physical movement of a fluid (liquid or gas).
Word family
- conduct (verb): To transmit heat or electricity.
- conductive (adjective): Having the property or capability of conducting.
Collocations
- thermal conduction
- electrical conduction
- rate of conduction
- conduction of heat
Example sentences
- "Metals are excellent media for the conduction of heat due to the high mobility of their free electrons." Scientific explanation of heat transfer in metals
- "In solid bodies, the heat is conducted from one part to another by conduction." Classic physics textbook citation
Memory hook
Think of a train conductor leading passengers directly down the train cars; conduction leads heat directly through a solid object. Direct contact leads the heat.
When not to use
Do not use when heat is transferred through bulk fluid movement (which is convection) or through electromagnetic waves (which is radiation).
Fun facts
- Diamonds are actually incredible conductors of heat—about five times better than copper—which is why they feel icy cold to the touch; they rapidly draw heat away from your skin.
Related words
Explore more words
conductor, conductivity, contagion, Temperature, electron, current
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