Here's a breakdown:

* Sublimation: The transition of a substance directly from the solid state to the gaseous state, without passing through the liquid state. This occurs when the molecules on the surface of a solid gain enough energy to overcome the forces holding them together and escape into the gas phase.

Examples of sublimation:

* Dry ice (solid carbon dioxide): Dry ice sublimates at room temperature and atmospheric pressure, turning directly into gaseous CO2.

* Napthalene (mothballs): Mothballs are made of napthalene, which slowly sublimates, releasing a vapor that repels moths.

* Frozen water (ice): Ice can sublimate under certain conditions, especially in cold, dry environments.

Let me know if you'd like to know more about the conditions that favor sublimation!