3. Wha
4. Which movement of the Earth causes seasons?
What causes variation in the length of days and nights?
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Answer:Variations in the length of day and night time from season to season on the earth's surface is due to the axial tilt of earth's rotation axis with respect to its orbital axis. This causes variations in the intensity of Sun's rays falling at a given place over the span of a year leading to variations in day
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Answer:
revolutionary motion(around the sun) .... variation in length of day and nights is due to the presence of time lag between the places
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