Notes can move upward If you think of the lines as a ladder, it is easier to understand them. The higher you climb on the ladder of lines, the higher the notes will sound. The spaces count as steps on the ladder too.
Notes can move by step b This means there will be a note on every line and space, consecutively
Notes can move by skip This means that notes are placed on the staff, or sounded by a pattern of skipping every other note. *In the example below, the space notes are skipped, so the notes move up by skip.
Notes can move by leap b This means that the distance between the notes is farther than a skip. b Notes that move by leap will sound far apart as well.