Melodic Minor Scale: This is another variation of the natural minor scale where both the sixth and seventh degrees are raised when ascending, but revert back to their original positions when descending.
Relative Major Key: The relative major key shares the same key signature as its corresponding minor key. For example, A harmonic minor and C major have identical notes.
Leading Tone: In music theory, the leading tone refers to the seventh degree of any diatonic scale that resolves strongly to the tonic note or chord. In harmonic minor scales, this leading tone is raised by a half step for added tension and resolution.