Final answer:
The state of a substance is a physical property. Physical properties describe the characteristics of matter that can be observed or measured without changing the chemical composition of the substance.
Step-by-step explanation:
The state of a substance is a physical property. Physical properties describe the characteristics of matter that can be observed or measured without changing the chemical composition of the substance. The state of matter refers to whether a substance is a solid, liquid, or gas. Examples of other physical properties include density, color, and melting point.