Which motion causes day and night?
Earth’s rotation causes day and night. It is day on the side of earth facing the sun. As earth continues to turn to the east, the sun appears to set in the west. Sunlight can’t reach the side of earth facing away from the sun, so it is night there. It takes earth about 24 hours to rotate once. As you know, each 24-hour cycle of day and night is called a day.