One possibility is a change in state.
Physical changes in a substance result in
These changes are of physical nature as boiling, freezing, sublimation.
This process is known as a physical change. It involves a change in the state or appearance of a substance but does not result in the formation of a new substance. Examples of physical changes include melting ice, boiling water, and breaking a glass bottle. The chemical composition of the substance remains the same throughout the physical change.
Viscosity is a physical property of a substance, which describes its resistance to flow or deformation. It is determined by the intermolecular forces within the substance and is not a result of any chemical changes or reactions.
Phase changes are physical changes in nature. They involve a change in the state of matter (solid, liquid, gas) rather than a change in the chemical composition of the substance. Heating or cooling a substance can trigger phase changes.
When a substance is heated, it may undergo physical or chemical changes such as melting, evaporation, sublimation, or decomposition. These changes can result in alterations in the substance's physical state, color, texture, or chemical composition.
A physical change, such as melting ice or cutting paper, does not result in a new substance being formed. These changes only affect the physical state of the matter, not its chemical composition.
Physical changeschemical changesYou must understand that matter can be in any one of three PHYSICAL states, liquid, solid or vapor ( a gas ).Changing physical states is not a chemical change, but a direct result of heat or cold application.
there is to types of change to a substance chemical and physical in a physical change the result is a mixture also most times you can change your end result into what you started with e.g.freeze-melt evaporate-condesate
a physical is a change to a substance
Physical changes do not change the properties of the substance. You can get back the original state of the substance in most cases by reversing the physical process.
Reversible changes and physical changes are not exactly the same. Reversible changes can be undone and the original substance can be recovered, while physical changes alter the appearance or state of a substance without changing its chemical composition. Physical changes are usually reversible, but not all reversible changes are physical changes.