On a keyboard the distance from one key to the next key is ?

Half a note including "black keys" and a whole note with only "white keys".

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Originally Posted by abegrl

on a keyboard the distance from one key to the next key is ?

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The distance is called an interval.

If counting from one note to another within just a scale, then you have intervals of unison, 2nd, 3rd, 4th, 5th, 6th, 7th and 8th or also called octave. Intervals can also go beyond the octave. Then you will have 9ths, 10ths, 11ths, 12ths, 13ths and so forth. All of these intervals can be either Major, minor, diminished or Augmented, depending upon the spelling of flat or sharp of each note of the interval and what the type of scale is in which they are being used.

Intervals are also comprised a half-steps and whole-steps, skips and leaps. A half-step is where you go from one note to the one that is immediately next to it. A whole step is a kind of skip. You skip just one note in order to arrive at the next note. A leap is where you skip over more than one note in order to arrive at the next one. Half-steps, whole-steps, skips and leaps also have the numeric names in ordinals like I explained in the first paragragh and can also be Major, minor, diminished and Augmented.