Question

a.
Why do the areas near the equator have
almost equal length of day and night?​

Answer 1

Equinox literally means equal night, giving the impression that the day and night on the equinox are exactly the same length; 12 hours each

Answer 2

Rotation of the Earth causes night and day to alternate. Since we learned that the Earth's axis is tilted and hence the equator is not facing the Sun directly, different places on Earth would experience unequal length of days and nights—not exactly 12 hours of day and 12 hours of night all the time.

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