Identify four properties of a substance that will never change

Density, boiling point, melting point, condensation point.

Explanation:

The characteristic properties of a chemical substance are defined as the fixed and unique properties that are used for the identification and the classification of the given substance.

They can be physical as well as chemical properties such as density, solubility, freezing point, boiling point, melting point, condensation point, and viscosity.

the earth would become to overheated and everything alive on it will eventually die from overheating. plants will eventually die as well, water will evaporate, and it will be nothing but a hot planet without anything living on it.