The corresponding lines from bottom to top are G, B, D, F, A, respectively. Note that the bass clef, also called the F clef, has dots surrounding the F line. This is because the treble and bass lines are played simultaneously but written separately. On a keyboard, for example, the bass line is played with the left hand and the treble is played with the right. Short lines that appear with notes written above or below a stave are called ledger lines .
Ledger lines correspond with the main stave lines.
When two or more notes are written and played as a single unit, they're called chords .