Adding or removing energy from matter causes a physical change as matter moves from one state to another.
Example : adding thermal energy to liquid water causes it to become steam or vapor ( a gas ) and removing energy from liquid water causes it to become ice (a solid).
Adding or removing energy from matter causes a physical change as matter moves from one state to another. For example, adding thermal energy (heat) to liquid water causes it to become steam or vapor (a gas). And removing energy from liquid water causes it to become ice (a solid).
