Simplify the following text for a Grade 5 native English-speaking person.
Original: Specific heat , also called specific heat capacity , is defined as the amount of energy that has to be transferred to or from one unit of mass ( kilogram ) or amount of substance ( mole ) to change the system temperature by one degree . Specific heat is a physical property , which means that it depends on the substance under consideration and its state as specified by its properties .
Simplified: Heat is a form of energy and not a physical substance .