The natural minor scale is a seven-note diatonic scale built on the pattern whole-half-whole-whole-half-whole-whole, with a lowered 3rd, 6th, and 7th compared to major. It matches the minor key signature exactly and serves as the unaltered base form of the harmonic and melodic minor scales (AP Music Theory 2.1.A).
The natural minor scale is what you get when you play the notes of a minor key signature with zero accidentals added. Its step pattern is whole-half-whole-whole-half-whole-whole. Compare it to a major scale starting on the same note and you'll find three differences. The 3rd, 6th, and 7th scale degrees are each lowered by a half step, which is exactly what gives minor its darker sound.
Here's the framing the CED cares about (PIT-1.G.1). Natural minor is the base form of minor. The harmonic and melodic minor scales are defined as altered forms of the natural minor scale, not as separate things. Harmonic minor raises the 7th, and melodic minor raises the 6th and 7th going up (then reverts to natural minor coming down). So if you know natural minor cold, the other two forms are just one or two tweaks away. The one thing natural minor lacks is a leading tone. Its 7th scale degree sits a whole step below tonic (sometimes called the subtonic), which is the whole reason composers raise it in the first place.
Natural minor lives in Unit 2: Music Fundamentals II, specifically Topic 2.1 (Minor Scales). Learning objective 2.1.A asks you to identify natural, harmonic, and melodic minor forms in both performed and notated music. That means aural skills, not just spelling. You should be able to hear the lowered 7th of natural minor versus the raised 7th of harmonic minor, and spot the difference on a staff. Natural minor also connects to Topic 2.10 (Melodic Transposition) through LO 2.10.A and PIT-3.C.6, since transposing a minor melody means preserving its exact whole-step and half-step pattern at a new pitch level. Everything you do with minor keys later in the course, like building leading-tone chords and writing dominant harmony in minor, starts from knowing which scale degrees natural minor lowers.
Keep studying AP Music Theory Unit 2
Visual cheatsheet
view galleryHarmonic Minor (Unit 2)
Harmonic minor is just natural minor with the 7th raised a half step. That one change creates a leading tone, which is what minor-key harmony needs for a strong dominant chord. The exam loves asking exactly which degree changes between the two forms.
Melodic Minor (Unit 2)
Melodic minor raises both the 6th and 7th degrees ascending, then reverts to plain natural minor on the way down. So the descending melodic minor scale literally IS the natural minor scale. That's a free identification shortcut on listening questions.
Key Signature (Unit 2)
The natural minor scale is the only minor form that matches its key signature with no added accidentals. If you see a minor-key passage with a raised 7th written in as an accidental, that's your visual clue the composer left natural minor behind.
Melodic Transposition (Unit 2)
Per PIT-3.C.6, transposing a melody means moving it to a new pitch level while keeping its intervallic content intact. For a natural minor melody, that means the W-H-W-W-H-W-W pattern must survive the move exactly, so an A natural minor tune transposed up a whole step becomes B natural minor.
Natural minor shows up most often as an identification task, matching LO 2.1.A's two modes. In notated music, you'll be asked to spell a natural minor scale from a given tonic or to name which scale a passage uses. In performed music, you'll hear a melody and decide whether the 6th and 7th degrees are lowered (natural), or raised (harmonic or melodic). Practice questions consistently test the difference between natural and harmonic minor, asking which scale degree gets altered. The answer is always the 7th. Transposition questions can also fold natural minor in, asking you to move a minor melody to a new pitch level while keeping every interval the same. No released FRQ has hinged on the term "natural minor" by itself, but sight-singing and melodic dictation in minor keys assume you can navigate all three minor forms, and natural minor is the reference point for the other two.
Natural minor uses only the notes of the key signature, so its 7th degree sits a whole step below tonic and there is no leading tone. Harmonic minor raises that 7th degree a half step (always written as an accidental, never in the key signature), creating a leading tone and a distinctive augmented 2nd between scale degrees 6 and 7. If you hear or see a raised 7th, it's not natural minor anymore.
The natural minor scale follows the step pattern whole-half-whole-whole-half-whole-whole and lowers the 3rd, 6th, and 7th scale degrees compared to the parallel major scale.
Natural minor matches the minor key signature exactly, with no accidentals added anywhere in the scale.
The CED treats harmonic and melodic minor as altered forms of natural minor, so natural minor is the baseline you compare everything else against (PIT-1.G.1).
Natural minor has no leading tone because its 7th degree sits a whole step below tonic, which is why harmonic minor raises it.
The descending form of the melodic minor scale is identical to natural minor.
LO 2.1.A requires you to identify natural minor in both performed and notated music, so train your ear on the lowered 6th and 7th, not just your eyes.
It's the seven-note scale built from the pattern whole-half-whole-whole-half-whole-whole, using only the notes of the minor key signature. Compared to major, its 3rd, 6th, and 7th scale degrees are each lowered a half step.
Not exactly, but they're connected. "Relative minor" describes a key relationship (a minor key sharing its key signature with a major key), while "natural minor" is one specific form of the minor scale. The relative minor's natural minor scale uses the same notes as its relative major, just starting on a different tonic.
One note. Harmonic minor raises the 7th scale degree of natural minor by a half step to create a leading tone. That raised 7th always appears as an accidental in the music, never in the key signature.
No. Its 7th scale degree is a whole step below tonic, which is called the subtonic. The lack of a leading tone is the main reason composers use harmonic minor for chords and cadences in minor keys.
Two reliable shortcuts. Either write the notes of the minor key signature starting on the tonic, or take the parallel major scale and lower scale degrees 3, 6, and 7 by a half step each. For example, A natural minor is just A to A on the white keys.
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