Is not a physical change melting cheese fermenting of mixing two cheeses in bowl grating cheese?

Let's break down each process and determine if it's a physical or chemical change:

* Melting cheese: This is a physical change. The cheese changes state from solid to liquid, but its chemical composition remains the same. You can solidify the cheese again by cooling it, reversing the change.

* Fermenting of cheese: This is a chemical change. Fermentation involves microorganisms breaking down the cheese's components, changing its chemical makeup and resulting in different flavors, textures, and aromas.

* Mixing two cheeses in a bowl: This is a physical change. You're simply combining two substances without altering their chemical structure. The cheeses retain their individual properties.

* Grating cheese: This is a physical change. You're only altering the shape and size of the cheese, not its chemical composition.

In summary:

* Physical changes are temporary and don't change the chemical makeup of the substance (like melting and grating cheese, or mixing different cheeses).

* Chemical changes result in the formation of new substances with different properties (like fermenting cheese).