相そう変へん化か

noun

phase change; phase transition

Scientific term for a change between solid, liquid, gas, or other phases of matter.

• 水みずの相そう変へん化かは0度どで起おこる。

  The phase change of water occurs at 0 degrees.

• この物ぶっ質しつは高こう温おんで相そう変へん化かを起おこす。

  This substance undergoes a phase change at high temperatures.