Final answer:
Heat energy is the transfer of energy from a higher temperature object to a lower temperature object until they reach the same temperature.
Step-by-step explanation:
The energy that is transferred from an object with a higher temperature to an object with a lower temperature is known as heat energy. This transfer occurs because of the temperature difference between the two objects, and it continues until thermal equilibrium is reached, meaning both objects are at the same temperature. No work is done during this process as heat is simply the energy moved spontaneously due to the difference in temperature.