It is pretty cool! Make sure that the eyelet holes are in line with each other. Finally, you will test your water clock. Day and night, our watches, clocks, and cell-phone clocks help us to manage our time. After the nail is halfway in the cork, pull it out. Full assessment credit should be given to any group whose robot meets the specifications. Yes. The dowel must be sturdy, but it should not be heavy enough to push the cork or other buoyant material into the water. Do you think that you could use a water clock in your daily life, perhaps to time tasks like doing homework? This image shows a flowerpot with some of the openings blocked with plumber's putty. Mark the center of the wood stake using a ruler and pencil. Prepare the upper container by making a hole in the side of the container toward the bottom so that water can drain from it. Set this float stick assembly aside. The distance the stick rises is linked not only to the amount of water in the lower container, but also to how much time has passed; it indicates how much time has elapsed since the lower container was empty. A hole smaller than the diameter of the pin is desirable. Thank you! ), What does this tell you about a water clock? Water clocks are one of the oldest time measuring systems. That's about it. What advantage does it have over other devices such as sundials? Help your child cut the top off the plastic bottle about three inches from the top. If it does, what do you believe causes the variation? It took five years to perfect the design of this remarkable timepiece. The task is to design a feedback-controlled robotic system to keep the water level in the bottle constant enough to maintain a steady drip rate. The face cheeks were all put together using biscuit joinery and Titebond III glue. If you are making a clock that is easy to move, should the containers be large or small? I joined them with a waterproof polypropylene glue, and I … The larger the containers are, the more water they can hold and the more time they can track. Consider using flowerpots, buckets, or empty soup cans. Mark it as "0 seconds.". When 30 seconds have gone by, mark the water level on the tape. If you do, what does that mean for size and weight? wikiHow is where trusted research and expert knowledge come together. A drip rate of 10-15 ml/min will give appropriately accurate data (when the volume that drips out is measured). It is for decoration only, and not actual work, but it looks great. You can find this page online at: https://www.sciencebuddies.org/science-fair-projects/project-ideas/ApMech_p047/mechanical-engineering/build-a-water-clock. Since the water clock depends solely on the flow of water, it can operate at night or on days when the sun does not shine. The next one will be six feet in diameter. This waterwheel comes to us from Gary Mastolier in Bonners Ferry, Idaho. Ideally, the bottom container should be clear so that you can read the measurement of time more easily. Perform a water test on both containers to verify that there are no leaks. If your upper container has any openings like the flowerpot does, use the plumber's putty to block all of them. Use caution when using tools like hacksaws and hammers. That's two pieces of 3/4" Doug fir glued together cross grain to each other. Look at Figure 4 to see how to do this. Ask students to select what they consider to be the most important parts of the device. The upper container in Figure 1 is a plastic flowerpot with several openings along the bottom. You’ll find a link to “I Did This Project” on every project on the Science Buddies website so don’t forget to share your story! Table 1. (second) a lower container that catches the water as it flows out of the upper container; and This clock was special not only for accurately keeping time, but also for its amazing engineering. Start timing immediately. Your own creativity in this regard should be restricted only by what is reasonably available in your school. It is 36 inches in diameter and the 16 buckets are 12 inches wide. What will happen if the containers are made out of a material that can absorb water? Now push a small hole through the bottom of the cup with your pencil or pen. If you make a mistake, you should cover up the hole with plumber's putty and try to create a new one in a different spot. It's a Matter of System ›Water 3: Melting and Freezing ›, toolsA Question of Temperature ›Careers in Sports and Exercise Science ›, science updatesCell Phone Air Sensors ›Cold Car Start ›. Ask your adult volunteer help you with this step. The two marks you have made on the stake are the spots where you will attach the eyelet screws. Choose the correct size of eyelet screw (No. You may print and distribute up to 200 copies of this document annually, at no charge, for personal and classroom educational use. Start by writing down the design requirements of the clock. When the wall clock shows 7:45 a.m., we finish our breakfasts and rush out the door to school or work. Can you think of some ideas to keep the water level constant in the upper container? I was very interested in your water wheel project. Using a hot glue gun, glue the tops of the two lids together. Encourage your child to learn about the physical world with lots of hands-on activities. Heavy or light? The waterwheel will be raised higher than shown and will drain into a cascading waterfall. If either container has any holes in it, patch the holes with thick plumber's putty. Pierce the bottom of the cup with an embroidery needle or sewing needle to create a small hole. Use a permanent marker to mark, on the lower half of the bottle, how much water falls within one minute. You successfully shared the article. The finished robots must have a prominent sign giving the conversion factor from volume of water collected to minutes from beginning of collection. Your alarm water clock should provide some kind of noise so that if you are not in the same room as the water clock you can hear when time is up. Students should jot down and describe some of the parts that make up the water clock. If you have plugged a previous hole with plumber's putty, do not make a new hole in the same place through the putty, which will change shape slightly over time, making your hole grow larger and changing the rate at which the water drips through it. No, though the bigger it is, the easier it will be to read. We use cookies and those of third party providers to deliver the best possible web experience and to compile statistics. The filter system and pump will be housed inside the building for ease of access. The following video Place the float stick inside the lower container near the same side as you have set the wood stake. We have woodworking plans to build clocks of many shapes and sizes from small mantle clocks to the full size grandfather floor model clocks with swinging pendulums. Reproduction of material from this website without written permission is strictly prohibited. TM ® & © 2020 Scholastic Inc. All Rights Reserved. To create this article, 11 people, some anonymous, worked to edit and improve it over time. A flush toilet uses water flow to dispose of waste. This is a Sketchup rendition of approximately what our water feature will look like. The only metal in this project other than a few screws are the axle, two roller bearings and the metal flanges to hold the bearings centered in the wooden pillow blocks. Check periodically to see if you can spot any leaks. It is for decoration only, and not actual work, but it looks great.

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