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Lesson 5 of 5
  • Year 10
  • Eduqas

Classical music in the 20th century

I can explain how classical music developed in the 20th century, identifying key features and genres.

Lesson 5 of 5
New
New
  • Year 10
  • Eduqas

Classical music in the 20th century

I can explain how classical music developed in the 20th century, identifying key features and genres.

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Lesson details

Key learning points

  1. In the 20th century, classical music developed in various different ways.
  2. Many composers used non-functional harmony, while some experimented with atonal and microtonal music.
  3. Experimental composers challenged core principles of the Western Classical Tradition (e.g. silent music, chance music).
  4. Minimalist composers wrote mostly diatonic music based on repeating ostinati and gradual changes.

Keywords

  • Atonal - music which has no key or tonic note

  • Minimalist music (minimalism) - a style of music that emerged in the 1960s in the USA, defined by its repetition of minimal musical ideas

  • Non-functional harmony - where chords don’t have their traditional roles (e.g. chord V resolving to I, using mostly primary chords)

  • Experimental music - music that radically challenges what we think of as 'normal' music

  • Ostinato - a short, repeating musical idea (plural: ostinati)

Common misconception

Non-functional harmony sounds the same as functional harmony.

While some of the chords might be the same, the difference is in the role. In functional harmony, chords have specific roles (e.g. V coming before I to create resolution). In non-functional harmony, any chord can be used whenever the composer wants.


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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.
Which period came directly before the 20th century in Western classical music?

Renaissance
Baroque
Romantic
Classical and Romantic combined

Q2.
A short, repeating musical idea is called an .

Correct Answer: ostinato, ostinati

Q3.
Which of these describes atonal music?

based in one clear key
alternating between two keys
Correct answer: music with no key or tonic note
music that repeats only tonic chords

Q4.
Match the term to its meaning:

Correct Answer:diatonic,using only notes of the scale/key

using only notes of the scale/key

Correct Answer:chromatic,using notes outside the key

using notes outside the key

Correct Answer:microtonal,using notes between Western semitones

using notes between Western semitones

Q5.
What does the word experimental suggest in music?

copying older tradition
avoiding rhythm completely
Correct answer: challenging what we think of as “normal” music
only using microtones

Q6.
In minimalist music, ideas change over time.

Correct Answer: gradually, slowly

Assessment exit quiz

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6 Questions

Q1.
Which is a feature of minimalist music?

sudden tempo changes
Correct answer: repetition of short ideas with gradual changes
constant modulation between keys
no use of rhythm

Q2.
Music that has no key or tonic note is called music.

Correct Answer: atonal

Q3.
Match the style to its feature:

Correct Answer:minimalism,diatonic music with repeating ostinati

diatonic music with repeating ostinati

Correct Answer:experimental music,radical challenges to normal music (chance, silence)

radical challenges to normal music (chance, silence)

Correct Answer:microtonal music,uses notes smaller than Western semitones

uses notes smaller than Western semitones

Q4.
Which composer mixed Hungarian folk music with non-functional harmony?

Debussy
Schoenberg
Correct answer: Béla Bartók
John Cage

Q5.
A short musical idea that repeats is an __________. In minimalist music, several of these are layered together.

Correct Answer: ostinato, ostinati

Q6.
Which of these is an example of experimental music?

a string quartet by Haydn
Correct answer: John Cage’s 4’33”
a Chopin nocturne
a Bach fugue