Keep in mind that the machines in Figures 1 and 2 are just two examples of how you could approach the task. You will start out with a cup containing a mix of two different size spheres, pour them into the machine, and the machine should sort them into two separate cups. In this project, your goal is to build a gravity-powered marble sorting machine that can sort large and small plastic spheres (representing rocks and gems, respectively), like the ones shown in Figures 1 and 2. Many times, these mechanical sorters are powered by motors, but simple systems are powered only by gravity.
Some systems use bursts of compressed air to blow away lighter materials, while materials with a higher density remain in place.
Particles with a smaller diameter fall down through the screens, while larger particles stay on top. Others use mechanical methods like screening, where particles fall through screens with different-sized holes. Some sorting systems use complex electrical sensors, for example, to measure whether a metal is magnetic or how reflective it is, in order to sort them.
Modern industrial mines use a variety of automated processes to separate valuable gems and minerals from dirt and other rocks.
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Early miners would use a manual process, called panning to separate gold nuggets from dirt and sand in a pan. What if you worked at a bank and had to sort thousands of coins, or at a food processing factory dealing with thousands of pounds of flour? Then it would certainly help to have a machine do the work. Regardless of what exactly they sort, they all have something in common: they automate a task that would be very difficult, or even impossible, for humans to do! It is not such a big deal to sort a few dollars' worth of change or to use a hand sifter for a cup of flour. Sorting machines come in all shapes and sizes, ranging from tiny toy coin sorters to huge industrial sifting machines used in food processing or mining. Note: This project can also be done for your local science fair, in addition to, or instead of, the Fluor Challenge. Try this project to build your own marble machine and submit your score to see how you rank against other competitors in theĢ016 Fluor Engineering Challenge and possibly win a cash prize for your school or afterschool organization! That might seem like a strange task, but have you ever used a coin sorter to separate pennies, nickels, dimes, and quarters? How about using a sifter in the kitchen to separate fine grains of flour or sugar from bigger lumps? Machines that can automatically sort objects or particles of different sizes are used in many applications for example, in the mining industry to separate valuable gems and minerals from rocks and dirt. Put your engineering skills to the test to see if you can build a machine-powered by nothing but gravity-that will automatically sort out two different sizes of plastic spheres. Ages 9–up.Create Assignment Create Announcement Abstract Given the potential of discovering clues to where the actual bejeweled numbers (created by jewelry designer Anna Sheffield) have been hidden, kids should be plenty motivated to pore over each scene. The right side of each spread is an overhead cutaway view of each apartment, ostensibly drawn by Twintig. Dodge and Twintig make their way down the building, interviewing bizarre residents in equally eccentric apartments (Sigfried Plumpjack’s dwelling is a maze of hamster trails for him and his piano-playing hamster). They are summoned to a 13-story apartment building to investigate a string of robberies: the emerald-encrusted numbers have been stolen from a clock belonging to owner Bevel Ternky, and his 12 tenants have also been burgled. Narrator Gus Twintig plays an imbecilic Watson to the Holmes that is detective Roy Dodge. But the chief draw is the promise of-very real-buried treasure, with the clues to its locations hidden within the book. Part The Westing Game, part Masquerade, this board book mystery lures readers in with its pentagonal shape, dry humor, and pages of intricate details.
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