What is the significance of the 7 note scale in music theory and how does it influence the composition of melodies?

The 7 note scale, also known as the diatonic scale, is significant in Music Theory because it forms the foundation for most Western music. It influences the composition of melodies by providing a set of notes that create a sense of harmony and structure. Composers use the notes of the scale to create melodies that are pleasing to the ear and follow established musical conventions.