#phase_change__phasechange__phase_transition__phasetransition__state_change__statechange__physical_change  a change from one state (solid or liquid or gas) to another without a change in chemical composition
  supertype:  natural_process__naturalproces__natural_action__naturalaction__action__activity  a process existing in or produced by nature (rather than by the intent of human beings); "the action of natural forces"; "volcanic activity"
  subtype:  freezing__freeze  the withdrawal of heat to change something from a liquid to a solid
     subtype:  icing__frost  the formation of frost or ice on a surface
  subtype:  liquefaction  the conversion of a solid or a gas into a liquid
     subtype:  dissolving__dissolution  the process of going into solution; "the dissolving of salt in water"
  subtype:  melt__thaw__thawing__melting  the process whereby heat changes something from a solid to a liquid; "the power failure caused a refrigerator melt that was a disaster"; "the thawing of a frozen turkey takes several hours"
  subtype:  evaporation__vaporization__vaporisation__vapor__vapour  the process of becoming a vapor
     subtype:  boiling  the application of heat to change something from a liquid to a gas
     subtype:  clouding_up__clouding  the process whereby water particles become visible in the sky
     subtype:  smoke__smoking  a hot vapor containing fine particles of carbon being produced by combustion; "the fire produced a tower of black smoke that could be seen for miles"

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