In the second example, we still have the root above the fifth, and now we have added a fifth below the root. The third example shows just the two lowest notes of the previous example. Here the root is actually the higher of the two notes, and the fifth is the lower note. This is another important shape to learn. Now lets combine our understanding of power chords with the minor scale that we learned in the last lesson.
Lets write all the power chords for the E minor key.
I numbered the chords using roman numerals. This is the convention for chords. In this and future lessons from me, it will be understood that we are talking about root-fifth power chords when I use a roman numeral. Note that this is not always the case in other kinds of music. Finally, if you are wondering why I used lowercase letters for the 3rd, 6th and 7th chords, it is because we are using the minor scale, and these three minor intervals are flatted with respect to the major scale.