Physical properties can be observed without chemically changing matter. These properties include:

* Color

* Odor

* Taste

* Texture

* Density

* Melting point

* Boiling point

* Solubility

* Electrical conductivity

* Thermal conductivity

Physical properties can be used to identify substances, determine their purity, and predict their behavior. For example, the melting point of a substance can be used to identify it, and the density of a substance can be used to determine its purity.