How Do You Build A Water Powered Clock?
Water clocks are among the most ancient timekeeping devices. They were used by both the Ancient Egyptians and Greeks. The Greeks gave the water clock the name “clepsydra,” or “water thief.” Water drains from a vessel at a fixed rate of speed. The vessel is marked to show the hours of the day. As the vessel empties, the time is shown by the level of the water. Water powered clocks use gravity as their sole source of energy. Lay the plastic bottle on its side. This will be the main vessel of the water powered clock. Take the small nail and place the point approximately one inch from the bottom of the bottle. Use the hammer to gently drive the nail through the side of the bottle. The nail must not go all the way through to the other side of the bottle. Use the scissors to trim a piece of masking tape to the exact length of the bottle from just below the mouth to the bottom of the bottle. Attach the tape to the side of the bottle opposite the nail hole. The tape should extend as far up the
