Final answer:
An object can maintain the same temperature while gaining heat by undergoing a phase change, where heat is absorbed without increasing the temperature until the phase change is complete.
Step-by-step explanation:
Something can keep its temperature the same but gain heat by undergoing a phase change.
This process is known as an endothermic reaction, where heat is absorbed from the surroundings to change the state of a substance without increasing its temperature.
For example, when an ice cube melts in your hand, it absorbs heat from your hand, but the temperature of the water that results from the melted ice remains at 0°C (the melting point) until all the ice has melted.
Such phase changes include melting (solid to liquid), vaporization (liquid to gas), and sublimation (solid to gas).