2: What happens at the 12th fret of a guitar?
The note sounded is a dominant 7th of the open string.
The note sounded is the octave of the open string.
The neck becomes narrower.
The sound becomes out of pitch.

3: In harmonic tuning, you use the ______ tones of the strings to produce high pitch sounds, and then use these to tune.
triadic
harmonic
5th
minor

4: If you tune in a room with a set temperature and humidity, then take the guitar into another room that is hotter/colder or more/less humid:
the strings may loosen.
the pitch may sound higher.
the guitar may go out of tune.
there is no noticeable effect.

5: The letter names of the lines of the treble staff can be memorized using the following sentence:
Every Boy Does Just Fine
Good Boys Always Do Fine
Any Boy Can Do Fine
Every Good Boy Does Fine