Here's how it works:

* Vibrating Molecules: Molecules in a solid are constantly vibrating. The faster they vibrate, the hotter the solid is.

* Transfer of Energy: When a hot object touches a cooler object, the faster-vibrating molecules in the hot object bump into the slower-vibrating molecules in the cooler object.

* Increased Vibration: This bumping action transfers energy, causing the slower-vibrating molecules to speed up.

* Conduction: The process of heat transferring through direct contact between molecules is called conduction.

Example: If you hold a metal spoon in a pot of boiling water, the heat from the water transfers to the spoon by conduction. The molecules in the hot water vibrate quickly and transfer this energy to the molecules in the spoon, causing the spoon to heat up.