Final answer:
Typical structures of Baroque music include alternation between small and large groups of instruments, contrasting instrumental and vocal sections, and movements that alternate between fast and slow tempos.
Step-by-step explanation:
The structures typical of a Baroque musical composition often include the following characteristics: First, the alternation between a small group and a large group of instruments, commonly known as the concerto grosso form, where a group of soloists (concertino) alternates with the full orchestra (ripieno). Second, an instrumental section followed by a vocal section is not uncommon in Baroque cantatas and oratorios, where instrumental sinfonias or ritornellos provide a contrast to vocal movements. Lastly, the contrast of movements, such as a fast energized movement followed by a slow, solemn movement, as found in the Baroque dance suites, is a hallmark of the dynamic and expressive nature of Baroque music.