A rotation is when the planet spins around once. The Earth rotates counterclockwise; this is why the Sun “rises” in the East and “sets” in the West. It is not the Sun's movement that causes days, but rather the Earth turning around in front of the Sun. read more
The primary effect of Earth's rotation is the phenomenon of day and night. The rotation of the Earth about its axis in an anticlockwise direction (when viewed from over the north pole) gives us the impression that the sun rises in the east and sets in the west. read more