A major scale is a group of eight notes that produces the familiar sound:
You now know all of the notes needed to play the G major scale.
The number underneath each note indicates its position in the scale. These numbers are called scale degrees. The names of the first and last notes of a major scale are always the same. In the G major scale, the distance from one G to the G note above it (or below it ) is one octave (eight notes). An octave is the range of eight notes of a major scale.