Question

During the course of the year, the length of the day changes Why does it happens

Answer 1

Answer: Every location on Earth experiences an average of 12 hours of light per day but the actual number of hours of daylight on any particular day of the year varies from place to place. ... Earth rotates on its axis; this causes us to experience day and night.

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Answer 2

Answer:

The length of the day changes during the course of the year because the axis of the earth is titled (23.5°) when it moves around the sun. Hence, the position of the sun changes during summer and winter. Thus, creating a difference in the length of the day during different part of the year.