its boiling point

its reactivity

its density

its conductivity

heating it to find the temperature at which it melts

exposing it to a flame to see if it catches on fire

hitting it with a hammer to determine if it breaks or bends

placing it in water to find out whether or not it dissolves

Both the identity and the properties of a substance change.

Some properties of a substance change, but its identity remains the same.

The chemical properties of a substance change, but its physical properties remain the same.

The physical properties of a substance change, but its chemical properties remain the same.

chemical property

physical property

melting point

chemical change