The G major scale starts and ends on the note G and contains an F# note instead of an F@ note. Play the following G major scale and notice that it still has the familiar sound Do Re Mi Fa So La Ti Do.
The F# note in this scale is played with the same fingering as the low F#, but with the octave key added. Notice once again the scale degrees written under the notes.
In exercise 16 you were introduced to key signatures. A key signature consists of one or more sharps or flats written after the treble clef, or in the case of the key of C major no sharps or flats. Because the G major scale contains the note F#, the key signature for the key of G major will consist of an F# note written after the clef.
This is the key signature for the key of G major. It has one sharp sign after the treble clef.
The C major scale contains no sharps or flats, therefore the key of C major contains no sharps or flats.
It is possible to play any melody in more than one key. In exercise 41 you learned this song in the key of C major. Here is the same song in the key of G major. Changing the key of a piece of music is called transposing.