In common usage, physical change refers to alteration of the condition of an object or substance. Physical change is also a broad term used by scientists to describe a class of physical alterations, chemical, biological, or morphological. It may refer to a change of physical state or the nature or condition of matter as a result of chemical or physical action. Usage is subjective to the scientific discipline involved when used as a qualifier, and means different things in chemistry, physics and biology.
Examples of Physical Changes:
Chemistry: Dissolving salt into a solution.|
Molecular: From crystalline to alternate structures.
Common usage: Crushing a material like paper.
Five-Year Average Global Temperature Anomalies from 1880 to 2006