In music theory, the term minor scale refers to three scale patterns – the natural minor scale (or Aeolian mode), the harmonic minor scale, and the melodic minor scale (ascending or descending) – rather than just one as with the major scale.
I was listening to a podcast yesterday. There were two speakers, both claim to have been classically-trained with degrees in music theory and/or music performance.
Neither of them could “speak” the difference between the “minor” scales
- harmonic – seventh degree raised semitone – leading tone
- melodic – raised sixth and seventh degree ascending, not raised descending
You’ll know it when you hear it.