Given the background description of some cooking related query, summarize the question into a title
Q: Broadly speaking UK recipes will specify amounts by weight (lbs/ounces or metric), whereas American recipes will specify amounts by volume (cups).Is there an explanation for how the two different approaches arose in the first place? I'm not talking about whether or not metric is used, but specifically about volume versus weight.
A:
Cups v. weighing scales - is there an historical explanation?