Question

What causes day and nights?
(A) Earth's rotation
(B) Earth's revolution
(C) sun's rotation
(D) sun's revolution

Answer 1

Hint: The earth is one of many planets orbiting the sun, and the moon orbits the earth. The earth is actually a sphere and the sun is a nearby star which is an incredibly large ball of light that illuminates light and heat as the products of a nuclear reaction.

Complete answer:For many people here on earth, sunrise, sunset, and day and night cycles are simple facts of life. As a result of the annual changes that take place each year, the length of the day and night may vary - and be longer or shorter - in just a few hours. However, in some parts of the world, the Sun does not set a specific time of year. And there are times of the year when one night can last for many days. The earth orbits the sun once every 365 days and orbits its axis once every 24 hours. Day and night are due to the Earth rotating on its axis, not its orbit around the sun. The term 'one day' is determined by the time the earth takes its orbit around its axis and includes the time of day and night. The earth is round and the sun is a star and produces light. The earth and the sun are part of a solar system, and the sun is at its center. At any one time half of the Earth's surface is in sunlight and the other half is in darkness.

therefore, the correct option is (A)

Note: The rotation of the earth takes place from west to east, which is why the Sun always appears to rise from the eastern horizon and set in the west. If you were to look up at the earth from a distance and look down at the northern polar region, the planet would be in orbit around the clock. However, if you look at the southern hemisphere, it seems to be rotating clockwise.