iv) How are days and nights caused?
nityatraders101:
by the rotation of the earth
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The Earth orbits the sun once every 365 days and rotates about its axis once every 24 hours. Day and night are due to the Earth rotating on its axis, not its orbiting around the sun. The term 'one day' is determined by the time the Earth takes to rotate once on its axis and includes both day time and night time.
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Days and nights are caused by the rotation of the Earth around its own axis. Due to the spherical shape of the Earth, only one half of the Earth gets light and heat from the Sun at a particular time. The portion of the Earth that receives sunlight is known as day, while the other portion is known as night.
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