1. Musical intervals: octave, sixth, fifth, fourth, third.
2. Major chord, 4:5:6.
3. Use of sharps and flats. Tempered scale.
4. Resonance, sympathetic vibration, explanation, examples.
Exercises
1. What is a major scale? Why is a major scale said to be built upon three triads?
2. Why are sharps and flats necessary in music?
3. What is the tempered scale and why is it used? What instruments need not use it? Why?
4. Mention two examples of resonance or sympathetic vibration from your own experience out of school.