1. 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

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 Housewww.edheads.org How do you learn? Visit http://www.educationplanner.com/ to find out – take the quiz http://www.educationplanner.com/

3. Agenda 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

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.ht ml http://www.fi.edu/qa97/spotlight3/screwdemo.ht ml Archimedes screw at http://www.cs.drexel.edu/~crorres/Archimedes/S crew/ScrewAnimation.html http://www.cs.drexel.edu/~crorres/Archimedes/S crew/ScrewAnimation.html

13. Pulleys How Stuff Works: Block & Tackle (pulley) http://science.howstuffwork s.com/pulley.htmhttp://science.howstuffwork s.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 activitywww.edhead.org Let’s check out the Odd Machine nextOdd Machine

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

16. What is it? http://www.mos.org/sln/Leonardo/LeosMysteriou sMachinery.htmlhttp://www.mos.org/sln/Leonardo/LeosMysteriou sMachinery.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 moved Distance = How far the object is moved http://home.earthlink.net/~dmocarski/chapters/chap ter5/ch5page.htm http://home.earthlink.net/~dmocarski/chapters/chap ter5/ch5page.htm 100 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/m achine/index.htm http://sunshine.chpc.utah.edu/javalabs/java12/m achine/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.comhttp://lynnembailey.edublogs.orgwww.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