Final answer:
A physical property is a characteristic of a substance that can be observed or measured without changing its identity. Examples of physical properties include color, hardness, melting point, and electrical conductivity.
Step-by-step explanation:
A physical property is a characteristic of a substance that can be observed or measured without changing the identity of the substance. Examples of physical properties include color, hardness, malleability, solubility, electrical conductivity, density, melting point, and boiling point. These properties can be perceived by the senses and can be measured or calculated using scientific tools and techniques.