What are the differences between sentence and period music theory?

Sentence and period are two types of musical forms in Music Theory.

In sentence form, a musical idea is presented and then repeated with variation, creating a sense of question and answer.

In period form, a musical idea is presented and then followed by a contrasting idea, creating a more complete and balanced structure.

Overall, sentence form is more concise and repetitive, while period form is more expansive and structured.