'''Fusion''' is a process that results in the [[phase change]] of a substance from a [[solid]] to a [[liquid]]. The internal [[energy]] of a solid substance is increased (typically by the application of heat) to a specific temperature (called the [[melting point]]) at which it changes to the liquid [[phase]]. An object that has melted completely is '''molten'''. | '''Fusion''' is a process that results in the [[phase change]] of a substance from a [[solid]] to a [[liquid]]. The internal [[energy]] of a solid substance is increased (typically by the application of heat) to a specific temperature (called the [[melting point]]) at which it changes to the liquid [[phase]]. An object that has melted completely is '''molten'''. |