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Summer Science Workshop Compound Machines

Summer Science Workshop Compound Machines. How Many Teachers Does it Take to Change a Light Bulb ? Lynne M. Bailey CSD 9 Title IIB STEM Grant lynnembailey@yahoo.com. Pre-Requisite.

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Summer Science Workshop Compound Machines

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  1. Summer Science WorkshopCompound Machines How Many Teachers Does it Take to Change a Light Bulb? Lynne M. BaileyCSD 9 Title IIB STEM Grant lynnembailey@yahoo.com

  2. Pre-Requisite • If you did not complete the first simple machines workshop, visit www.edheads.org; click on Simple Machines, click Start and visit the House • How do you learn? Visit http://www.educationplanner.com/ to find out – take the quiz

  3. Paperwork Introduction Protocols Online learning style test Objectives Review Work & Machines Activities Analyzing devices Exploring online activities and resources Reflection and classroom application Share-out Agenda

  4. Introductions • Paperwork done? • Protocols – leave no tracks! • No food at computer stations please

  5. What Are Machines? • Devices that do work • Don’t increase the amount of work done, but make work easier • How? By changing the force, the distance or the direction of the force

  6. What Makes Them Simple? • Requires the application of a SINGLE force to work

  7. Simple Machine Review • Inclined Plane (Ramp) • Lever • Wedge • Wheel & Axle • Screw • Pulley

  8. Inclined Plane • http://weirdrichard.com/inclined.htm • What simple machines are inclined planes?

  9. Wedge • What wedges do we use all the time?

  10. Lever • Bar that’s free to move about a fixed point called a fulcrum • Three types F – R – E • First class lever – like a see-saw. One end will lift an object up just as far as the other end is pushed down • F = Fulcrum in the middle • Second class lever – like a wheel barrow. Long handles are really the long arms of a lever. • R = Resistance in the middle • Third class lever - like a fishing pole. When the pole is given a tug, one end stays still but the other end flips in the air catching the fish. • E = Effort in the middle

  11. Wheel & Axle • Rolling along – how would we transport without them? • Reduce resisting force by distributing it throughout the wheel or axle, and therefore make it easier to haul loads

  12. Screw • What simpler machines make a screw? • What everyday machines use screws? • Online demo at http://www.fi.edu/qa97/spotlight3/screwdemo.html • Archimedes screw at http://www.cs.drexel.edu/~crorres/Archimedes/Screw/ScrewAnimation.html

  13. Pulleys • How Stuff Works: Block & Tackle (pulley) • http://science.howstuffworks.com/pulley.htm • Are there pulleys in the room?

  14. Complex Machines • Back to www.edhead.org; Go to Simple Machines and click on the Tool Shed for complex machines and complete the activity • Let’s check out the Odd Machine next

  15. Let’s Try This • Go to Inventors Toolbox at http://www.mos.org/sln/Leonardo/InventorsToolbox.html • Review the different kinds of machines • Continue to the Gadget Anatomy web page and complete the activity there • Group activity: Sketch your gadget!

  16. What is it? • http://www.mos.org/sln/Leonardo/LeosMysteriousMachinery.html

  17. What Do Machines Have To Do With Work?

  18. What Is Work? • Amount of energy transferred by a force • You are doing work when you use a force to cause motion • Simply, when you cause something to move, that is work • To measure the amount of work you do, multiply the force times the distance the object moved. • Work= Force x Distance of object moved

  19. Inclined Plane Work Example • W (Fd)= F x D Work = Your Effort Force = Object to be movedDistance = How far the object is moved http://home.earthlink.net/~dmocarski/chapters/chapter5/ch5page.htm100 x 12’ = 400 lb X 3 feet • Energy is conserved: Work Input = Work Output

  20. Let’s Investigate • Java required for this website: http://sunshine.chpc.utah.edu/javalabs/java12/machine/index.htm • Teams conduct online experiments 1, 2 or 3 • Worksheets provided for data collection

  21. Constructing Devices • These devices are often found in compound machines • Gears: Jar tops, corrugated cardboard, pushpins • Belt Drive: Sewing spools; pencils, screws, or dowels; ribbon, base, sandpaper; figurines and glue • Cam Shaft: cut wood, cardboard tubes, dowels, glue guns • Find examples of how yours is used

  22. How Many Teachers does it take to … • Design a Rube Goldberg machine • If time… or on your own … construct part of the device you designed

  23. Rube Goldberg • http://pbskids.org/zoom/activities/sci/rubegoldberginventio.html#results • http://rube.iscool.net/ • http://www.snopes.com/photos/advertisements/hondacog.asp • http://www.teachersdomain.org/app.cgi/search/run_search?terms=machines

  24. Exploring Resources • Web page at wikipsaces.com • Technoed.wikispaces.com • Check the blog, http://lynnembailey.edublogs.org for updates or my website www.lynnembailey.com • What can you use in your classroom? • How can you apply this science thread in your subject area?

  25. Reflection and Share -out • Written reflection of today’s workshop or • Add a comment to the blog • http://lynnembailey.edublogs.org • Questions? • Tomorrow’s workshop • Complete evaluation forms

  26. Thanks for Coming! Lynne M. Bailey STEM Trainer 917.309.4361 lynnembailey@yahoo.com

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