Question.
Why do the poles experience about six months of day and six months of night?
( Chapter 3: Motions of the Earth, Class 6- The Earth: Our Habitat ( GEOGRAPHY), SOCIAL SCIENCE)
Answer.
The poles experience about six months of continuous daylight and six months of continuous darkness due to Earth's axial tilt and its orbit around the Sun.
Here are the explanations:
Axial Tilt:
Earth's axis is tilted relative to its orbit around the Sun, with an inclination of approximately 23.5 degrees. This tilt remains relatively constant throughout the year.
Orbital Motion: As Earth orbits the Sun, different parts of the planet receive varying amounts of sunlight. When one of the poles is tilted toward the Sun, that polar region experiences continuous daylight, while the opposite pole is tilted away from the Sun and experiences continuous darkness.
Due to the revolution of the earth on the tilted axis of 23.5 degrees, for about six months, regions beyond the Arctic Circle ( 66.5 degrees north latitude) or Antarctic Circle ( 66.5 degrees south circle) do not receive much light.
For about six months, either of the poles is tilted towards the sun. The pole which is tilted toward the sun experiences six months of day and the other pole experiences six months of night. North Pole experiences six month days from May to July; and the south pole experience six month day from August to April.
So, the combination of Earth's axial tilt and its orbital motion around the Sun causes the polar regions to experience six months of daylight and darkness. This phenomenon is essential in shaping the extreme climates and unique environmental conditions found in the Earth's polar regions.
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