Water freezing at 0 degrees Celsius is a physical property. Here's why:

* Chemical properties involve changes in the chemical composition of a substance. This means new substances are formed with different chemical bonds and properties.

* Physical properties can be observed or measured without changing the chemical composition of the substance.

When water freezes, it changes state from liquid to solid, but its chemical formula (H₂O) remains the same. The water molecules simply rearrange themselves into a more ordered structure.

Here are some additional points:

* Freezing point is a physical property that describes the temperature at which a liquid transitions to a solid.

* Chemical changes often involve things like burning, rusting, or decomposition.

Let me know if you have any other questions!