Here's why:
* Conduction is the transfer of heat energy through direct contact between molecules.
* Direct contact is crucial. When two objects touch, their molecules can vibrate and collide, transferring heat energy from the hotter object to the colder one.
* Without contact, there is no way for the molecules to interact and transfer heat energy.
Other ways heat can transfer without direct contact:
* Convection: Heat transfer through the movement of fluids (liquids or gases).
* Radiation: Heat transfer through electromagnetic waves, like the heat from the sun.
So, while conduction requires direct contact, other methods of heat transfer can occur without it.
