Science Journey Session #3 Simple Machines How can you move that? Lynne M. Bailey CSD 9 Title IIB STEM Grant

Agenda Paperwork Introduction Protocols Online learning style test Objectives Pre-test Work & Machines Activities Analyzing devices Build a Catapult Exploring online activities and resources Post-test Reflection and classroom application Share-out

Introductions Paperwork done? How do you learn? Hurricane preparedness week is the last week in May.Hurricane preparedness week EQ preparedness quiz online at click on “April is Earthquake Awareness Month” and click on quiz Protocols – leave no tracks!

What Do Machines Have To Do With Work?

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

What Are Machines? A machine is a device that does 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

Simple Machines Inclined Plane (Ramp) Lever Wedge Wheel & Axle Screw Pulley

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

Let’s To the Video video.org/details.php?videoid=6216http:// video.org/details.php?videoid=6216

Machine Stations Each group completes activity at one station Share results later Use materials to construct the simple machine Use group worksheet to record results Discuss ideas, predict results (hypothesis0, test (experiment), record findings, analyze results, and write conclusion How did this machine work? How did it make work easier?

More Hints Lever: Move fulcrum and load Plane – Vary slope; compare to lifting without machine Wheel & axle – How far does it go? Screw – What is a screw made of? How can you make one with these materials? Wedge – How are cuts different, similar? Pulley – compare effort with and without

Edheads Simple machines on line Go to – click on Simple Machines and complete activitywww.edheads.org Use group worksheet to identify objects

Lever A bar that is free to move about a fixed point called a fulcrum Group report Three types First class lever – like a see-saw. One end will lift an object up just as far as the other end is pushed down Second class lever – like a wheel barrow. The long handles of a wheel barrow are really the long arms of a lever. 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.

Let’s Investigate Website: Nova r.html r.html Hands-on Materials: rulers, 5 pennies, worksheet Java required for this website: achine/act1/lab2.htm achine/act1/lab2.htm

Little Video wkey=56ac902e14526e63081dhttp:// wkey=56ac902e14526e63081d

Inclined Plane What simple machines are inclined planes? Group report

Inclined Plane Work Example W (Fd)= F x D Work = Your Effort Force = Object to be moved Distance = How far the object is moved ter5/ch5page.htm ter5/ch5page.htm 100 x 12’ = 400 lb X 3 feet Energy is conserved: Work Input = Work Output

Wedge What wedges do we use all the time? Group report

Screw What simpler machines make a screw? What everyday machines use screws? Group report Online demo at ml ml Archimedes screw at crew/ScrewAnimation.html crew/ScrewAnimation.html

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 Group Report

Pulleys How Stuff Works: Block & Tackle (pulley) Are there pulleys in the room? Group Report

Let’s Fling Some Marshmallows Using the materials provided, construct a catapult Can you design and build one that hit a target?

Complex Machines Back to Go to complex machines and complete the activitywww.edhead.org

Let’s Try This Go to Inventors Toolbox at ox.html 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!

What is it? sMachinery.htmlhttp:// sMachinery.html

Rube Goldberg

Exploring Resources Web page at wikipsaces.com Technoed.wikispaces.com (may be moved)Technoed.wikispaces.com Check the blog, for updateshttp://bronxdip.edublogs.org What can you use in your classroom? How can you apply this science thread in your subject area?

Reflection and Share -out Written reflection of today’s workshop or Add a comment to the blog

Commercial Video Movie previewpreview

Closing Questions Post-test Evaluations Check the blog for these and more resourcesblog

Thanks for Coming! Lynne M. Bailey STEM Trainer