Lesson Notes By Weeks and Term v3 - Senior Secondary 1
Scales
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Scales
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Subject: Music
Class: Senior Secondary 1
Term: 2nd Term
Week: 1
Theme: Theory Of Music I
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Students should be able to identify major and minor scales (natural; melodic and harmonic) distinguish between African and Western scales. use a pentatonic scale to compose a simple melody
Definition of a Scale: A scale is a series of musical notes arranged in a specific order, usually ascending or descending, within an octave. The intervals (distances) between the notes determine the character and type of the scale. Scales are the building blocks of melodies and harmonies.
Intervals: Whole Step (Tone - W): The distance of two semitones (e.g., C to D, F to G). On a piano, it skips one key (black or white).
Half Step (Semitone - H): The smallest interval in Western music, the distance between two adjacent notes (e.g., C to C#, E to F). On a piano, it's the next key, black or white.
Western Scales: Western music primarily uses diatonic scales, which are seven-note scales (plus the octave) with specific whole and half step patterns.
1. Major Scale: Structure: Characterized by a bright, happy, and stable sound. Its interval pattern is W-W-H-W-W-W-
H. Example: C Major Scale C (Root) - W - D - W - E - H - F - W - G - W - A - W - B - H - C (Octave)
Degrees: The notes of a scale are referred to by their scale degrees (1st, 2nd, 3rd, etc.). C = 1st (Tonic) D = 2nd (Supertonic) E = 3rd (Mediant) F = 4th (Subdominant) G = 5th (Dominant) A = 6th (Submediant) B = 7th (Leading Tone) C = 8th (Octave)
2. Minor Scales: Minor scales typically have a melancholic, sad, or serious quality. There are three common forms of minor scales: a.
Natural Minor Scale: Structure: Its interval pattern is W-H-W-W-H-W-
W. It is the relative minor of a major scale, starting on the 6th degree of the major scale.
Example: A Natural Minor Scale (relative to C Major) A (Root) - W - B - H - C - W - D - W - E - H - F - W - G - W - A (Octave) b.
Harmonic Minor Scale: Structure: It is derived from the natural minor scale by raising the 7th degree by a semitone (to create a leading tone). This creates an augmented 2nd interval between the 6th and 7th degrees, giving it a distinctive "oriental" or exotic sound.
Example: A Harmonic Minor Scale A - W - B - H - C - W - D - W - E - H - F - (Augmented 2nd) - G# - H - A (Comparing with A Natural Minor: G becomes G#) c.
Melodic Minor Scale: Structure: It is designed to sound smoother than the harmonic minor, especially when ascending.
Ascending: The 6th and 7th degrees are both raised by a semitone (similar to the upper tetrachord of a major scale).
Interval pattern: W-H-W-W-W-W-
H. Descending: It reverts to the natural minor form.
Interval pattern: W-W-H-W-W-H-
W. Example: A Melodic Minor Scale Ascending: A - W - B - H - C - W - D - W - E - W - F# - W - G# - H - A Descending: A - W - G - W - F - H - E - W - D - W - C - H - B - W - A African Scales (Pentatonic Focus):
1. Pentatonic Scale: Structure: A five-note scale within an octave. It is very common in traditional African music, as well as Chinese, Scottish, and Native American music. A key characteristic is the absence of half steps (semitones), making it sound very open and stable, often without the strong pull of a leading tone found in Western diatonic scales.
Types: Major Pentatonic: Derives from the major scale by omitting the 4th and 7th degrees.
Example: C Major Pentatonic Scale C - D - E - G - A - C (1-2-3-5-6-8 of C Major)
Minor Pentatonic: Derives from the natural minor scale by omitting the 2nd and 6th degrees.
Example: A Minor Pentatonic Scale A - C - D - E - (semitones), making it sound very open and stable, often without the strong pull of a leading tone found in Western diatonic scales.
Types: Major Pentatonic: Derives from the major scale by omitting the 4th and 7th degrees.
Example: C Major Pentatonic Scale C - D - E - G - A - C (1-2-3-5-6-8 of C Major)
Minor Pentatonic: Derives from the natural minor scale by omitting the 2nd and 6th degrees.
Example: A Minor Pentatonic Scale A - C - D - E - G - A (1-3-4-5-7 of A Natural Minor)
Significance in African Music: The pentatonic scale (or variations thereof) facilitates improvisation and communal singing due to its consonant nature and lack of "dissonant" intervals. It allows for melodic flexibility and subtle pitch variations (microtones) often found in African vocal and instrumental traditions. Many Nigerian folk songs and even contemporary highlife and gospel music incorporate pentatonic melodies. Distinction Between African and Western Scales: | Feature | Western (Diatonic) Scales | African (Predominantly Pentatonic) Scales | | :---------------------- | :----------------------------------------------------------------- | :---------------------------------------------------------------------- | | Number of Notes | Primarily 7 notes (heptatonic) per octave. | Often 5 notes (pentatonic) per octave, though others exist. | | Interval Structure | Fixed pattern of whole and half steps. Strong sense of leading tone. | Often lacks half steps; open intervals. Flexibility in intonation (microtones). | | Harmonic Function | Strong emphasis on functional harmony (chords built on scale degrees). | Less emphasis on Western functional harmony; focus on melody, rhythm, polyphony. | | Melodic Character | Often structured with tension and release (due to leading tone). | Smooth, open, conducive to improvisation, often cyclical. | | Notation System | Staff notation with fixed pitches. | Traditionally oral; pitches can be more fluid and nuanced (e.g., pitch bends, glides). | | Cultural Context* | Basis of classical, jazz, pop, rock, and many contemporary genres. | Found in traditional folk music, ceremonial music, and forms the basis for much modern African popular music. | --- Materials: Whiteboard/Blackboard and markers/chalk Musical keyboard (or guitar, if available, for demonstration) Audio recordings of major, minor, and pentatonic music (Nigerian folk songs, Afrobeats, Western classical excerpts) Notation paper or exercise books Projector (optional, for displaying examples)
Phase 1: Introduction and Review (10 minutes)
Teacher Activity: Begins by asking students what they understand by the term "scale" in music. Briefly reviews the concept of notes (C, D, E, F, G, A, B) and intervals (whole step, half step). Plays a simple C Major scale on a keyboard/instrument and asks students to describe its sound.
Student Activity: Respond to questions about scales and intervals. Listen attentively to the played examples.
Phase 2: Exploring Western Scales (20 minutes)
Teacher Activity: Explains the structure of the Major Scale (W-W-H-W-W-W-H) using C Major as the primary example. Demonstrates playing it. Explains the three forms of Minor Scales (Natural, Harmonic, Melodic), highlighting their interval differences and unique sounds. Uses A Minor as the primary example for all three. Plays A Natural Minor, then A Harmonic Minor (emphasizing the raised 7th and the augmented 2nd), then A Melodic Minor (ascending and descending). Asks students to identify the "mood" or "feeling" evoked by each scale.
Student Activity: Copy the interval patterns for Major and the three Minor scales into their notebooks. Actively listen and try to discern the mood differences between major and different minor scales. Practice writing out C Major, A Natural Minor, A Harmonic Minor, and A Melodic Minor (ascending and descending) on notation paper.
Phase 3: Exploring African Scales (Pentatonic) and Distinction (20 minutes)
Teacher Activity: Introduces the Pentatonic Scale (5 notes, no semitones). Explains its prevalence in African music. Demonstrates C Major Pentatonic (C-D-E-G-A-C) and A Minor Pentatonic (A-C-D-E-G-A) on the keyboard, emphasizing the lack of tension. Plays audio examples of Nigerian folk songs (e.g., a simple children's song, a lullaby) that predominantly use pentatonic scales. Facilitates a discussion on the observed differences between Western diatonic and African pentatonic scales, listing points on the board. Encourages students to hum or sing along with the pentatonic examples.
Student Activity: Write down the structure of pentatonic scales (major and minor). Listen to and identify the pentatonic nature of the Nigerian musical examples. Participate in the discussion, contributing observations about the differences between the scale types. Practise singing or humming a simple pentatonic scale.
Phase 4: Composition Activity with Pentatonic Scale (15 minutes)
Teacher Activity: Briefly explains what a simple melody is (a succession of notes). Demonstrates composing a simple 2-bar melody using only the notes of the C Major Pentatonic scale, showing how to combine notes and simple rhythms. Provides a simple rhythmic pattern (e.g., two crotchets, one minim) and asks students to fit pentatonic notes to it. Guides students to compose their own 4-bar simple melody using any pentatonic scale (e.g., C Major Pentatonic or A Minor Pentatonic). Circulates to provide individual assistance.
Student Activity: Listen to the teacher's demonstration of pentatonic composition. Work individually or in pairs to compose a simple 4-bar melody using a chosen pentatonic scale. Attempt to sing or play their compositions (if instruments are available).
Phase 5: Conclusion and Wrap-up (5 minutes)
Teacher Activity: Summarizes the key learning points: identification of major/minor scales, distinguishing African/Western scales, and using pentatonic scales for composition. Assigns homework.
Student Activity: Ask any lingering questions. Note down homework assignment. --- Question 1: Identify the interval pattern for a Major scale and use it to construct the G Major scale.
Solution 1: Major Scale Interval Pattern: W-W-H-W-W-W-H G Major Scale Construction: Start at G (Root) G - (W) - A A - (W) - B B - (H) - C C - (W) - D D - (W) - E E - (W) - F# (F raised by a semitone to make a whole step from E) F# - (H) - G (Octave)
G Major Scale: G, A, B, C, D, E, F#, G
Commentary: This reinforces the consistent application of the major scale formula, requiring students to identify and correctly apply accidentals (sharps/flats) where necessary to maintain the whole/half step pattern.
Question 2: Construct the D Harmonic Minor scale, ascending only.
Solution 2: Recall Natural Minor Pattern: W-H-W-W-H-W-W D Natural Minor: D - E - F - G - A - Bb - C - D Harmonic Minor Rule: Raise the 7th degree of the natural minor scale by a semitone. In D Natural Minor, the 7th degree is
C. Raising C by a semitone gives C#.
D Harmonic Minor Scale: D - E - F - G - A - Bb - C# - D
Commentary: This question tests the understanding of how to derive the harmonic minor from the natural minor, specifically focusing on the modification of the 7th degree and the resulting interval changes.
Question 3: List three distinct characteristics that differentiate a typical African pentatonic scale from a Western diatonic scale.
Solution 3: Number of Notes: African pentatonic scales typically have 5 notes per octave, while Western diatonic scales (major/minor) have 7 notes per octave.
Interval Structure: African pentatonic scales often lack semitones, creating an open and consonant sound. Western diatonic scales have a fixed pattern of whole and half steps, including leading tones which create tension.
Harmonic Approach: African music, often based on pentatonic scales, traditionally places less emphasis on Western functional harmony (chord progressions) and more on melodic and rhythmic complexity, often featuring polyrhythms and call-and-response. Western diatonic scales are the foundation of a complex system of functional harmony.
Commentary: This question directly addresses Performance Objective 2 and encourages students to think broadly about the cultural and structural implications of different scale systems.
Question 4: Using the G Major Pentatonic scale, compose a simple 2-bar melody. Write it in rhythmic notation (e.g., using crotchets, minims).
Solution 4: G Major Pentatonic Scale Notes: G, A, B, D, E Example Melody (2 bars, 4/4 time signature): Bar 1: G (minim) - A (crotchet) - B (crotchet)
Bar 2: D (minim) - E (crotchet) - G (crotchet)
Commentary: This assesses Performance Objective
3. The solution provides a clear, simple example demonstrating how to use only the allowed notes and construct a basic rhythmic pattern. Teachers can encourage variation in rhythm and note choice. ---
Nigerian Music Composition and Analysis: Students can apply their understanding of scales to compose their own melodies for Nigerian cultural events, school concerts, or even for church and mosque services. For example, composing a simple praise song using a Major scale or a lullaby using a Minor Pentatonic scale. They can analyze existing Nigerian popular music (e.g., Afrobeats, Gospel, Highlife, Juju) to identify the predominant scales used, understanding how these scales contribute to the song's emotional impact and cultural resonance. Many highlife tunes, for instance, draw heavily from pentatonic ideas. Cultural Preservation and Appreciation of Traditional Music: The study of pentatonic scales directly connects to understanding the harmonic and melodic frameworks of various Nigerian traditional musics. Students can research and identify specific folk songs from their ethnic groups (e.g., Yoruba, Igbo, Hausa, Edo) and try to discern the scalar structures used, appreciating the unique tonal characteristics that differentiate them from Western music. This fosters cultural pride and a deeper understanding of indigenous musical heritage. For instance, many oral traditions of West African griots and storytellers use speech-song that often outlines pentatonic frameworks. Instrumental Performance and Improvisation: For students who play musical instruments commonly found in Nigeria (e.g., keyboard, guitar, traditional flutes, kalimba, Xylophones), understanding scales provides a framework for improvisation. Knowing the notes within a Major, Minor, or Pentatonic scale allows them to create spontaneous melodies that are musically coherent, whether accompanying a traditional dance or playing a solo in a contemporary band. This skill is highly valued in live performance settings across Nigeria. ---