Form-
binary form: AB
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Ternary Form: ABA
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Waltz: triple time, can be fast or slow; accent on 1st beat of the bar
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Mazurka: triple time, can be fast or slow; accent can be on any beat of the bar but more often on the 2nd beat
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March: quadruple or duple, can be fast or slow
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Scherzo: fast, playful, rhythmic
Dances-
Allemande: slow or moderate tempo, quadruple time, short upbeat start, smooth semiquaver figurations, imitative texture
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Courante(French): quick, 3/2,3/4 or 6/4 time, upbeat start, normally polyphonic texture and ornamented
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Courante(Italian): fast, running, triple time
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Sarabande: slow, stately, triple time, downbeat start, accent in 2nd beat of bar, regular 4 bar phrases, often has syncopation and hemiola rhythm
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Bourree: lively, duple time, upbeat start
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Minuet: moderate tempo, triple time
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Gavotte: quick, light and lively; duple or quadruple, upbeat or half-bar start
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Gigue: fast, dotted or triple rhythm in compound duple or simple triple or quadruple time; often contrapuntal or even fugal
Characteristics of different periods-
Baroque: mostly polyphonic texture, lots of sequences and imitations
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Classical: mostly homophonic texture, diatonic harmony, balanced phrases (normally 4 bar), simple harmonic accompaniments, simple melodic lines
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Romantic: chromatic harmony, lyrical and expressive melodic lines, richer sound, use dissonance and chromatic notes more freely, wide leaps in accompaniment
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20th Century: dissonant harmonies but not all, sometimes atonal, chromatic notes freely and widely used, irregular time signatures were common
hope this help... looks complicated and messy lol... the forms is quite a common question but for the dances, dont worry too much... not too common a question...
for the pieces, i also did Bagatelle and New Orleans Nightfall last time... most important thing when you're playing these pieces is to ENJOY, especially when it comes to New Orleans Nightfall when you have to maintain that calm and relaxing outset in the piece so dont rush through! free yourself from nerves if possible... anyway, good luck and all the best for your exam... let us know how it goes...

ShArOn