A treble clef indicates notes located above middle C, while the bass clef indicates notes that fall below middle C. A clef symbol in musical notation indicates the name and pitch of the notes on that line of the staff. The treble clef is also called the G-clef because it circles around the G line, while the bass clef is called the F-clef because it surrounds the F line.
The rest of the musical notes on the staff can be figured out by going through the musical alphabet, which goes from the letter "A" to the letter "G." With the treble clef, the lowest line is an E note. Going up, the gap between the lines is an F note, and the next line is a G, which is the line around which the treble clef wraps. Then, the notes restart at A and continue until F at the top line. The staff can be extended higher or lower with ledger lines.
Middle C is the first ledger line below the staff in treble clef and is the first ledger line above the staff in bass clef. The two dots in the bass clef are around the second line from the top of the staff, which is the F note. The bass clef goes from the G note at the bottom line to the A note at the top line.