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Lesson 5 of 5
  • Year 10
  • Edexcel

Harmony and tonality in Western classical music

I can explain the fundamentals of harmony and tonality and how they are used in Western classical music.

Lesson 5 of 5
New
New
  • Year 10
  • Edexcel

Harmony and tonality in Western classical music

I can explain the fundamentals of harmony and tonality and how they are used in Western classical music.

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Lesson details

Key learning points

  1. In the Baroque, Classical and Romantic periods, tonality was almost always major or minor.
  2. Every piece has a key signature, which explains which notes should be used in the given key.
  3. Harmony in all three periods is based on primary chords (I, IV and V), with some use of secondary chords.
  4. Romantic composers experimented more with chord choice and chromatic notes.
  5. Cadences are fundamental to all three periods with perfect and imperfect cadences being the most common.

Keywords

  • Tonality - the type of notes and chords that a piece of music is based on (e.g. minor, major, atonal)

  • Harmony - the way that notes combine to create chords and the way that those chords are used in a composition

  • Key - the specific set of notes that a piece is based on (e.g. C minor)

  • Key signature - which sharps or flats should be used in a particular key, written at the start of each stave

  • Cadence - a combination of two chords at the end of a phrase or section

Common misconception

Harmony and tonality are the same thing.

Tonality is to the type of notes and chords that are used (e.g. major). Harmony is the way the notes and chords are used within that key. Think of tonality as a language (e.g. English) and harmony as the word choice and order in a sentence.


To help you plan your year 10 music lesson on: Harmony and tonality in Western classical music, download all teaching resources for free and adapt to suit your pupils' needs...

There is a lot of content covered here. Try to build opportunities to revisit, consolidate and recap the main learning from this through homework or extension activities. Practice identifying key signatures and cadences is useful for the course, and there are various online tools designed for this.
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This content is © Oak National Academy Limited (2025), licensed on Open Government Licence version 3.0 except where otherwise stated. See Oak's terms & conditions (Collection 2).

Lesson video

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Prior knowledge starter quiz

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6 Questions

Q1.
In the Baroque, Classical, and Romantic periods, music was almost always written in which tonalities?

modal
Correct answer: major or minor
atonal
whole-tone

Q2.
What does a key signature show?

how loud the music should be
Correct answer: which sharps or flats are in the piece
the tempo of the piece
which chords should be used

Q3.
Which of these is a primary chord?

II
Correct answer: IV
Correct answer: V
VII

Q4.
Which period experimented more with chromatic notes and unusual harmonies?

Baroque
Classical
Correct answer: Romantic
Medieval

Q5.
The word “tonality” means:

the speed of the music
the volume of the music
Correct answer: whether a piece is in a major or minor key
the shape of the melody

Q6.
Which composer belongs to the Classical period?

Bach
Correct answer: Mozart
Tchaikovsky
Chopin

Assessment exit quiz

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6 Questions

Q1.
Which chords are most commonly used in cadences?

II and VII
Correct answer: V and I
Correct answer: I and V
VI and IV

Q2.
Which cadence sounds “finished” and complete?

imperfect
Correct answer: perfect
plagal
interrupted

Q3.
Which cadence sounds “unfinished” or like the music will continue?

Correct answer: imperfect
perfect
plagal
interrupted

Q4.
Which of these best describes harmony?

the speed of the piece
Correct answer: how notes combine into chords and how those chords are used
the loudness of the music
the instrument timbre

Q5.
Which of these is true about the Romantic period?

composers used only primary chords
cadences disappeared from music
Correct answer: composers experimented more with harmony and chromaticism
all music became atonal

Q6.
Which of these keywords means “a combination of two chords at the end of a phrase or section”?

harmony
key signature
Correct answer: cadence
tonality