Play any excerpt - from the listening library or anywhere - and tap what you hear. Each choice drops into your listening map and nudges you toward the Area of Study it belongs to. Finish by naming the period/AoS and saying why. Do it often and you won't need the page - the routine becomes the reflex.
How the real exam marks a "describe" question: one mark for each accurate, specific feature - so pack in as many precise observations as you can, and pair the feature with its effect ("…vibrato, for expressive effect"). Vague answers score little; "detailed" earns full marks.
Sitting the paper soon? Read How to answer the Listening paper - the full exam method, the four playings, and the free marks you can't lose.
Go deeper - three more lenses for when the spine is automatic
Your listening map
The verdict: so what is it, and why?
Pick an Area of Study above - your map becomes the "because".