CONDUCTION
This is the process by which heat energy is transferred from a region of high temperature of a body to a lower temperature body along a stationary solid material. It is this process that makes a pot on fire to transfer heat to the handle of a pot, even if only the tip is in the fireplace. This method of heat transfer requires a solid material medium.
If one end of a metal spoon is heated with a flame, the other end will also get heated up after a while. The heat energy is transferred from one end of the spoon to the other without the actual movement of particles (atoms or molecules) of the spoon. Such a mode of transmission of heat is called conduction. It resembles the example given in option 1 above.
The transfer of heat through matter without the actual movement of particles from their position is called conduction. Conduction occurs in solids, liquids and gases, but solids usually conduct heat better than liquids or gases.
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