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# 5th grade Ch. 13 Lesson 4 what are simple machines

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### Transcript

• 1. Ch. 13 Lesson 4 What are simple machines?
• 2.
• 3. machine
• device that changes the direction or the amount of force needed to do work
• 4. 6 kinds of
• 5. inclined plane
• slanting surface that connects a lower level to a higher level
• 6. inclined plane
• 7.
• 8. screw
• inclined plane wrapped around a center post
• 9. screw
• 10.
• 11. wedge
• 12.
• 13.
• 14. lever
• stiff bar that rests on a fulcrum
• 15. lever
• 16. lever
• 17. wheel and axle
• ex: doorknob
• wheel =knob
• axle =post that attaches to its center
• 18. wheel and axle
• 19.
• 20.
• 21. pulley
• changes the direction of motion to which a force is applied
• 22. pulley
• 23. complex machine- made of more than 1 simple machine
• 24. complex machine
• 25. Edheads -Simple Machines
• 26. Simple Machines Game
• Simple Machines game
• http://staff.harrisonburg.k12.va.us/%7Emwampole/1-resources/simple-machines/index.html
• http://sunshine.chpc.utah.edu/javalabs/java12/machine/index.htm
• http://www.galaxy.net/~k12/machines/index.shtml
• http://www.quia.com/pages/hostetterscience.html#simple
• How can we move our principal game