The document discusses the two motions of the Earth: rotation and revolution. It notes that rotation is the Earth spinning on its axis once every 24 hours, which causes day and night. Revolution is the Earth orbiting the Sun in an elliptical orbit, taking 365 days to complete one revolution and causing the seasons due to changes in distance from the Sun throughout the year. The rotation of the Earth occurs at approximately 15 degrees per hour and spins at over 1600 km/hr at the equator.