Lessons ยท Unit 12: Intervals by shape
Fourths and fifths
A fourth goes from a line to a space (or a space to a line) with a whole position in between. A fifth goes line to line skipping one line, or space to space skipping one space: it is the distance between two consecutive open strings on a guitar.
A visual trick: a fifth spans three lines counting both notes and the one between; a fourth never reaches that symmetry.
Drill
The session goes on until every skill below is mastered: at least 10 answers, at most 40. Your progress carries over between sessions.
Master the previous lesson first: Seconds and thirds