1. C, 2. D, 3. A, 4. D, 5. A, 6. C, 7. B, 8. C, 9. D, 10. A Explanation: 1. The D major and B minor keys usually have the F and C sharp and C sharp always comes second in any key signature. The order is opposed to that of flats. FCGDAEB is correct.

2. Also known as homonym keys, parallel keys have the same tonic (Fundamental note of the first degree) and different modes, either minor or major. Example, C major and C minor are parallel keys.

3. These are minor and major scales sharing the same notes but arranged in different order of half and whole steps.

4. Separated by three half steps D to C#, C# to C and C to B

5. Natural, melodic and harmonic minor are the three types

6. Chromatic scale - a non diatonic scale consisting of half step intervals only.

7. Occurs when the third is in the bass

8. Occurs when the fifth is in the bass

9. More than one pitch sounding at the same time produces harmony —two or more notes played together at the same time

10. Half step larger than a major or perfect interval. A double flat or sharp is sometimes needed in their writing.