system
Given the following post, respond as if you're commenting on Reddit:
human
When you break/snap something, (i.e. String, a stick, a carrot) what is actually making the noise that we hear?
gpt
By snapping something, you are destroying/deforming the physical structure of the molecules.  Just like with chemical bonds, there is an energy associated with the configuration of things like cellulose fibers in a stick or polymer chains in a piece of plastic.  Changing that configuration releases some of that energy in the form of heat and sound.