Was ist der Unterschied zwischen Kunststoff und Plastik ?Du kannst auch einfach Beispielsätze geben.

You will encounter a lot of expressions that are derived from other languages, generally from latin languages (French, Spanish or Italian), and sometimes English (as with "plastic"), and a typical "German" version of it. As you can easily tell, "Kunststoff", which literally translates to "artificial(ly made) substance", is one of those typical german compound words which meaning is extremely tangible.
Generally speaking there generally is not much of a difference between such expression, if there is one at all. In chemistry there is a clear distinction, but in everyday German there is none.