Question: how do you test the food

Grant Campbell answered on 12 Mar 2013:

Broadly, I suppose there are four ways of testing food:
i) What it’s made of (which is largely chemistry, so you’d use chemical tests like measuring the amount of fat, protein, vitamin C, minerals, horse DNA, etc.);
ii) How it behaves (which is largely physics, so you’d use physical tests like squashing or stretching it to see how hard you have to press or pull before it breaks);
iii) What it looks like – colour, structure etc. – and how it’s put together, for which you might use microscopes or X-rays;
iv) How nice it is to eat, which you do by feeding it to people and asking them to tick smiley or sad faces! 🙂