Structure - Level 3

Cycle Of Fifths - 

Strophic Form- or chorus form, is when the melody in each verse is the same, but the lyrics change.

Through Composed - is when each section of the music is different. So in a song each verse has a different melody. For example Queen's Bohemian Rhapsody.

Theme & Variation - A musical theme is introduced at the beginning of a piece. Then the melody is repeated but it is varied in some way. This is called Variation 1. The theme is repeated again but varied again. This is called Variation 2.

Sonata Form - a type of composition in three sections - exposition, development & recapitulation. It was introduced in the Classical period with composers like Mozart and Haydn.