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Answer:
When a warm front passes through, the air becomes noticeably warmer and more humid than it was before. ... On colored weather maps, a warm front is drawn with a solid red line. There is typically a noticeable temperature change from one side of the warm front to the other.
Explanation:
Basically all kinds of scientific investigations involve observations in the beginning- based on the observations one makes the hypothesis, which then one tests with the help of experiments.
