CBSE Class 8 Answered

In Physical change, physical state changes so when solid is converted into liquid than it absorbs energy from it's surrounding and when we want to convert liquid into gas than it absorbs energy from it's surrounding. When gas is converted in liquid or liquid is converted into solid than energy is released.

When energy is released in a change than it is known as exothermic change.

When energy is absorbed in a change than it is endothermic change.