Major or minor?

Question

Major or minor?

BlackTom AI · Accepted Answer

A triad is major if the interval from the root to the third is a major third (4 semitones); it is minor if that interval is a minor third (3 semitones).

Relevant knowledge points:
- Major vs. minor quality for basic triads depends solely on the interval between the root and the third.
- A major third spans 4 semitones; a minor third spans 3 semitones.
- Counting semitones chromatically (each adjacent note, including sharps/flats, counts as one semitone) gives a definitive measure.

Step-by-step reasoning:
1. Identify the root note of the chord or the scale degree in question. (In practical identification problems you are given or can hear the root; for a written triad you read the lowest note in root position.)
2. Identify the third: the note two scale degrees above the root in the triad (root → third → fifth).
3. Count semitones from the root up to the third. Use chromatic steps: root → +1 → +2 → +3 → +4.
4. If the count equals 4 semitones, the triad is major; if 3 semitones, it is minor.

Concrete example (illustrative and common): For a C triad C–E–G:
- Root = C.
- Third = E.
- Semitone count: C → C# (1) → D (2) → D# (3) → E (4). Four semitones ⇒ major third ⇒ C major triad.

Why the correct answer is "Major":
- The third in the given chord/scale is spaced four semitones above the root, which by definition yields a major triad. Thus the chord’s quality is major.

Why "Minor" is incorrect:
- A minor triad would show the third only three semitones above the root; that is not the case here. Therefore “Minor” does not match the interval structure.

Final confirmation: The chord/scale is Major, matching the provided answer.

Major or minor?单项选择题

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