II.1.4. Physical phenomena

A physical phenomenon (physical process) occurs when at least one of the physical properties that characterize a body changes over time.

🔦 Remark:

As a result of a physical phenomenon, the body does not change its substance.

Example of physical phenomena:

• Water boiling (water changes its state of aggregation, from liquid to gaseous);

• Body movement (changing the position of one body relative to another);

• Ice melting (water changes from solid to liquid);

• Sweetening the water by mixing it with honey (water changes its taste);

• Lighting the bulb (the filament heats up);

• Stretching a bow etc.