Conduction

From GAWDAwiki

Conduction is a method of heat transfer usually most successful in solids and stationary liquids. Heat is transferred when molecules make contact with each other and energy moves from molecules with more energy to those with less energy. Since energy and temperature are directly related, conduction transfers energy from warmer to cooler objects.

Solids are typically the most conductive of all states of matter because the molecules in solids are so close together. Since these closely-situated molecules make contact with each other more frequently than molecules in liquids and gases, conduction is best supported in solids. Liquids generally have less conductivity than solids, but more than gases.

Other methods of heat transfer include convection and radiation.^[1]

References

1. http://www.spiraxsarco.com/resources/steam-engineering-tutorials/steam-engineering-principles-and-heat-transfer/heat-transfer.asp