Question

When should a lab coat, safety goggles, and gloves be worn in the laboratory?

Answer 1

I would say that you should wear a lab coat, safety goggles, and gloves when the teacher says so - not everything in a lab is dangerous, so there is no need to always wear these. But when the teacher says you should - then you should. 

Answer 2

I would say you should wear it in a lab when you are working with dangerous chemicals. not any chemical is dangerous. hope this helped! :)