Physical phemomenon

A physical phenomenon is a change in the physical structure of matter — regarding shape, size, appearance, motion, and physical state — that does not alter the chemical composition of the matter.

A physical phenomenon is a set of changes and processes occurring in nature. A force is required for physical phenomena to occur. Forces encompass various interactions, such as fundamental interactions (e.g., electric, magnetic, or gravitational) or derived interactions (e.g., intermolecular interactions or friction).