what is a physical property

A physical property is a characteristic of matter that can be observed or measured without changing the identity of the substance. Physical properties are used to distinguish one substance from another, and they can be categorized into different types such as mechanical, electrical, optical, and thermal properties. Examples of physical properties include density, color, hardness, melting and boiling points, and electrical conductivity. Some physical properties can be observed without changing the physical state of the matter, while others can only be observed as matter undergoes a physical change. Physical changes are changes in the state or properties of matter without any accompanying change in the chemical identities of the substances contained in the matter. Physical properties can be either extensive or intensive. Extensive properties depend on the amount of the substance, while intensive properties do not.