harmony:primary chords of major and minor keys

• Harmony

  The simultaneous sounding of two or more pitches
• Chord

  Composed of three or more notes sounded together
• Triad

  A basic chord composed of the root, the third, and the fifth note of a major scale
• Primary chords

  • Tonic (I)
  • Subdominant (IV)
  • Dominant (V)
• Tonic (I)

  The first note of the given key
• Subdominant (IV)

  The fourth note of the given key
• Dominant (V)

  The fifth note of the given key
• Primary chords are used to accompany simple melodies