* Physical Properties: These are characteristics of a substance that can be observed or measured without changing the substance's chemical composition. Examples include color, density, melting point, boiling point, and state of matter (solid, liquid, gas).

* Chemical Properties: These describe how a substance reacts with other substances or changes its chemical composition. Examples include flammability, reactivity with acids, and ability to oxidize.

Freezing is the change of state from a liquid to a solid due to a decrease in temperature. It doesn't alter the chemical makeup of the substance, only its physical arrangement of molecules.

For example: Water (H2O) remains chemically the same whether it's in liquid form or frozen as ice. The arrangement of the water molecules changes, but the chemical formula stays the same.