https://www.musictheory.net/lessons/53 I found this website that seems to explain nonharmonic tones, but i dont understand what it means when it says which every tone is approached by a step or skip. For example the passing tone, says its approached by step, a step is equal to a minor second as this site says,G to F To E the third in a cmajor triad is supposed to be a passing tone. But G to f isnt a minor second, what am i missing, what does it mean to approach by step and skip in reference to the nonharmonic tones, can someone give me some detailed laymen terms of all the nonharmonic tones/non-chord tones changing tones retardation tones, suspened passing double neighboring tones, appogiatrura tones, escape tone, anticipation tones, passing tones, and neighboring tone.
A "step" (at least in this context) is either a half-step or a whole step. Thus it's a "second" which can be major or minor (or augmented or diminished but that's rather rare). Basically it's a change of name of a note; if A is used as a passing tone, it's approached by a B or a G (any of these may have an accidental.) It's not approached by a C or F (a "leap" not a "step").