A color of a substance is an example of which type of property?

The color of a substance is categorized as a physical property because it describes an observable characteristic that does not change the substance's chemical structure. Physical properties can be experienced through the senses, such as sight and touch, and include traits like color, odor, density, melting point, and boiling point.

Unlike chemical properties, which pertain to a substance's ability to undergo specific chemical changes or reactions, physical properties are present without altering the identity of the substance. For example, when you observe the color of an apple, the apple's chemical composition remains unchanged regardless of your observation. This distinction is essential in the study of materials, as physical properties allow for the classification and characterization of substances without impacting their inherent nature.

Additionally, reactivity refers to how a substance interacts with other substances, while thermal properties involve heat and temperature changes. Neither of these would pertain directly to the color observation.