One side of the Earth faces the sun, while the other side faces away into space. The side facing the sun is bathed in light and heat—we call this daytime. The side facing away is cooler and darker, and experiences night. read more
Watch the Earth pass from day into night. Day to night video › South Pole. The southernmost point of the Earth is the South Pole. Day. As Earth rotates, the half that faces the sun experiences day. The sun’s rays bring light and warmth to the surface. Night. As Earth rotates, the half that faces away from the sun experiences night. read more
As with many other seasonal experiences, the answer has to do with two facts: One, the Earth rotates on its axis as it orbits the Sun. read more
The cause of day and night is the rotation of earth on its axis. The sun that is the source of daylight cannot shine all over the earth at a time because of the shape of the earth ,which is sperical . So the one half of the sphere which faces the sun experience daylight and the other half experience night . read more