How are earth's rotation and the change from day and night related?

Answer 1

earth rotate on its own axis and around the sun. it takes approx 24hrs to complete one rotation on its own axis so at any instance in this 24hrs only half part earth will receive sunlight and the remaining half in the darkness

Answer 2

Our axis is *tilted* about 23.5 degrees from our plane of orbit... so, during our summers, the north pole is tilted *toward* the sun, and we get longer days, and more direct sunlight - heating the northern hemisphere. In the winter, it's the opposite effect, and we get much shorter days (and longer nights), and more indirect sunlight. This makes for cooler days, and colder temperatures.