G Major / E minor and F#
Here is a new note F# on the first string second fret. When new add a sharp sign next to a note (on the left) that note will go up in pitch by a semitone or one fret.
To cancel a sharp we use a natural sign:
Key of G Major and E minor
When the f notes in a piece are mostly sharp we can then say the piece is in one of two keys G major or E minor. To avoid having to write out all notes as F # we place a sharp at the start of the piece on the top F line. This is called a Key Signature and tells us what key the piece is in.
Here is the Key Signature of G Major and E Minor
Here are three exercises for you to try: G Major scale followed by two variations of the scale: