Final answer:
Scout reacted to seeing snow for the first time by crying and thinking the world was ending, which reflects her innocence and unfamiliarity with snow.
Step-by-step explanation:
Scout's reaction to seeing snow for the first time was one of confusion and fear. She cried and thought the world was ending. This reaction highlights her innocence and lack of experience with such weather, as she had never been exposed to snow before and did not know how to interpret the unfamiliar sight. This occurrence is a portrayal of Scout's character growth throughout the novel as she learns and understands more about the world around her.