Question

Explain one of the theories on how Post-It notes work. PLEASE HELP

Answer 1

That's called the mechanical theory of adhesives. Another theory of how glues work suggests the adhesive can diffuse into the surface and vice-versa, with molecules swapping over at the join and mingling together. This is called the diffusion theory.

Answer 2

Glue molecules stick to the surface molecules that it has been placed on similar to microscopic magnets