GK
WORLD GEOGRAPHY
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Question
[CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
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the earth’s rotation on its axis
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the earth’s revolution round the sun in an elliptical manner
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latitudinal position of the place
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revolution of the earth on a titled axis
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Detailed explanation-1: -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.
Detailed explanation-2: -This is because the Earth’s imaginary axis isn’t straight up and down, it is tilted 23.5 degrees. The Earth’s movement around this axis causes the change between day and night. During summer in the Northern Hemisphere, daylight hours increase the farther north you go. The Arctic gets very little darkness at night.
Detailed explanation-3: -As the Earth moves around the sun during a year, the northern half of the Earth is tilted towards the sun in the summer, making daytime longer than night. In winter, this reverses; the earth tilts away from the sun and nighttime becomes longer.
Detailed explanation-4: -As the Earth moves around the Sun, the length of the day changes. The length of day at a particular location on Earth is a periodic function of time. This is all caused by the 23.5-degree tilt of the Earth’s axis as it travels around the sun.