The measurement of the conditions at which the transition occurs is called Phase Transition Point. Example: The transition between the ferromagnetic as well as paramagnetic phases of magnetic materials at the Curie point. The matter phase is the class of various molecular motions which are existed at particular temperatures. At the low value of temperature, the molecular motion is restricted, therefore the molecules are bounded with strong intermolecular force of attraction. This is rigid phase. However at high temperature, the molecular motion is because of the translational energy of molecules, therefore the intermolecular forces are ignored while at intermediate value of temperatures, molecules are in translation motion however molecules are bounded with each other. The phase of matter is classified into three phase which are solid, liquid, as well as gas. The change in phase is defined as the change of one phase into another because of change in temperature. All these phases are differed in the kinetic energy of molecules; for example the change from solid to liquid takes place at the melting point of solid while the change from liquid to gas is done at boiling point. Here we’re discussing about the phase change because of change in temperature .