Freezing
Freezing describes the process of a liquid turning into a solid as it loses heat energy.
Freezing
gas
Simple: a transformation from a solid to a liquid.
Sublimation is the term used to describe the process of a solid substance changing directly into a gas without passing through the liquid phase. This occurs when the pressure is lower than the substance's triple point pressure.
freezing
The term is fusion (lay term is freezing).
Sublimation best describes the process in which a solid directly changes to a gas without passing through the liquid state.
Gas -> liquid = condinsation Liquid -> solid = solidification Solid -> liquid = fusion Liquid -> gas = evaporation Solid directly to gas (with out becoming liquid) = sublimation Example = dry ice at room temperature.
Sublimation, I think.Sublimation.
The common term for melting is "fusion." This process involves a substance changing from its solid state to a liquid state due to the absorption of heat.
Without the terms, it's difficult to be sure what is needed, but the usual term is sublimation.