half-step (HS) - movement on the piano from one key to the very next key, regardless of color or direction
whole step (WS) - movement on the piano from one key to the very next key w/one in between, regardless of color of direction
accidental - a symbol written beside a note to indicate which note on a piano to play
natural 
- any white note on a piano; cancels out an accidental (flat or sharp)
flat (b) - lower 1/2 step
sharp (#) - raise 1/2 step
scale - a group of notes that start and end on the same note
scale degree - a number that corresponds to a specific note of the major scale
octave - from one note to the same note, formed by moving up or down the piano twelve 1/2 steps
enharmonic - 2 notes that have the same sound and location on the piano, but are written differently on paper
chord - 3 or more notes being played at the same time
scale degree chord - a chord built off a scale degree of the major scale
inversion - a chord in which the order of the notes have been rearranged, formed by taking the bottom note of a chord and moving it to the top of the chord
interval - the distance between any 2 notes
lower case Roman numeral - represents any chord with a lowered 3rd
upper case Roman numeral - represents any chord with a regular 3rd
chord symbol - a shorthand way of representing a chord
harmony - 2 or more notes sounding at the same time
