Microorganisms causing diseases that characteristically are waterborne prominently include protozoa and bacteria, many of which are intestinal parasites, or invade the tissues or circulatory system through walls of the digestive tract. Various other waterborne diseases are caused by viruses.
As the Moon revolves around Earth, both objects also progress in orbit around the Sun. After completing one revolution with respect to the stars, the Moon must continue a little farther along its orbit to catch up to the same position it started from relative to the Sun and Earth.
To us on Earth, the Moon always has the same face pointed toward us. So the Moon might not seem to rotate. But to someone on the Moon, it certainly does â the Moon experiences day and night, but each day lasts about 14 Earth days, as does each night on the Moon. To Do: Put a person holding the Earth above their head in the center of a circle. Place a sticker on the Earth where you live.