Phase changes of water include melting and evaporation.
state change
Computing term for a change in the state of a system, object, or variable.
ボタンを押すと状態変化が発生する。
Pressing the button triggers a state change.
Colloquial use for any kind of transformation or change in condition.
彼の態度に状態変化が見られた。
There was a transformation in his attitude.