Music Theory/Fundamentals of Common Practice Music/Tonality

Modes
Modes means 7 scales in a major scale.Its based on the Major scale chord structure which is called Tetra Chord Theory.The theory is :Major-Minor-Minor-Major Major-Minor-Diminished-Major:.Modes goes with the notes of the scale.The seven modes are -

Ionian Dorian Phrygian Lydian Mixolydian Aeolian Locrian

To be continued ....