Question : What causes the day and night cycle on Earth?
Option 1: Rotation
Option 2: Revolution
Option 3: Rotation and revolution both
Option 4: None of these
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Correct Answer: Rotation
Solution : The answer is Rotation.
Earth revolves on its axis, which is called rotation. It takes 24 hours to complete one rotation. Day and night are caused by the rotation of the Earth. When a portion of the Earth faces the sun, day prevails, and the opposite side prevails at night.
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Question : A cyclist, after cycling a distance of 70 km on the second day, finds that the ratio of distance covered by him on the first two days is 4 : 5. If he travels a distance of 42 km on the third day, then the ratio of distance travelled on the third day and the first day is:
Question : The Purple Revolution, which was launched in Jammu and Kashmir, is also known as _______.
Question : The strong gravitational pull of ___________exerted on the earth's surface causes the tides.
Question : The height of a geostationary satellite from the Earth's surface is approximately:
Question : What is the greenhouse effect?
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