Answer:
Hey !!
I'm studying for the O-Levels, and I was reading the Marks scheme the other day. What thet expect is the CORMS experiment.
They want :
C- control required
O-oldness/age/of the same kind - where the age of all the testers should be the same
R- repeat the experiment
M -where measurement units should be mentioned
S standards of measuring, all undergo the same time, temperature etc. - the conditions of the experiment.
Good Luck! Hope it helps !! =)