Conduction is the transfer of heat through direct contact between substances. However, heat can also be conducted through a medium that connects the two objects.
For example, a metal rod can conduct heat from a hot object at one end to a cold object at the other end, even if the two objects are not directly touching. This is because the heat energy is transferred through the atoms of the metal rod, which vibrate and collide with each other, passing the energy along.
In summary:
* Conduction requires direct contact between the objects or through a medium connecting them.
* The medium must be a good conductor of heat, such as metal or water.
So, while direct contact is often involved in conduction, it's not an absolute requirement.
