All this should come pre-PPL, so you should know the answer to your question, years before sitting in a C152 or PA 38.
Your comment infers that it is a prerequisite to have been in the ATC, to have flown model planes as a child in order to become a PPL which, quite frankly, is a joke. My childhood was spent playing D&D, not with model airplanes.
What really winds me up is that you are practically
demanding that we should all know the answer to this question before even starting PPL training. The initial poster posed the question because he does NOT understand and hoped to find enlightenment here, he doesn't need comments like above dumped on him but instead a reasonable answer.
Your post just underscores my previous statement, that this sub forum is rapidly going downhill because of know it all "Sky Gods" belittling those who do their flying as a hobby or are learning to fly......