* Melting and Solidification: The process involves the wax changing states from solid to liquid (melting) and then back to solid (solidifying). These are physical changes because the chemical composition of the wax remains the same.

* No New Substances Formed: The wax doesn't react with anything to create new substances. It's simply changing its physical form.

Key takeaways:

* Physical Changes: Alter the appearance or form of a substance but don't change its chemical composition.

* Chemical Changes: Result in the formation of new substances with different properties.