4.4 Physical Change

The change of phase is due to changes in particle movement, not chemical changes.

Study Guide

Explain each concept

è Physical properties can be observed without changing the identity of the matter.

è The density of a substance is always the same at a given pressure and temperature.

è When a substance undergoes a physical change, its identity remains the same.

è A change of state is the conversion of a substance from one physical form to another.

è All changes of state are physical changes.

è The freezing point and melting point of a substance are the same temperature.