The document is a presentation by Mrs. Wagoner's science class on simple machines. It defines and provides examples of six simple machines: the first, second, and third class levers; the wedge; the inclined plane; the screw; the wheel and axle; and the pulley. For each machine, it explains how it works and provides diagrams and real-life examples. At the end, it invites the audience to an Invention Convention in the cafeteria to see demonstrations of inventions using simple machines.

1. The Students of Room 23 Proudly Present... Mrs. Wagoner’s Science Class A Lesson On Simple Machines

2. 1st class lever DEFINITION A FIRST CLASS LEVER IS A SIMPLE MACHINE THAT HELPS YOU MOVE THINGS FROM ONE PLACE TO ANOTHER. THERE ARE FOUR IMPORTANT PARTS TO A LEVER, A FULCRUM, A BOARD, A LOAD, AND THE EFFORT/FORCE.THE FULCRUM IS THE OBJECT THAT MAKES THE LEVER WORK. WHEN YOU PUSH ONE SIDE AND THE LOAD IS ON THE OTHER END, THE LOAD GOES UP. JORDAN & SARAH A

3. 2nd class lever the fULcrum and the effort are on each side of the load. this lever helps you carry heavy loads to different places. you don’t think about it but 2nd class levers are all around you. a lever is a stiff bar that balances on a fulcrum. A fulcrum is the place were the lever leans on a resting point. JACK, GRIFFIN, STEPHEN DIAGRAM PICTURES

4. 3rd class lever DEFINITION A THIRD CLASS LEVER NEEDS A FULCRUM, LOAD, AND EFFORT. THE EFFORT IS IN THE MIDDLE, THE LOAD IS ON THE OPPOSITE SIDE OF THE FULCRUM. LEVERS HELP PEOPLE LIFT LOADS WITH LESS FORCE. WHAT COULD DO WITHOUT LEVERS? SEBASTIAN CALVIN BEN Diagram

5. wedge A WEDGE IS A SIMPLE MACHINE THAT IS USED TO SPLIT VARIOUS OBJECTS LIKE WOOD, WATER, AND AIR. A WEDGE HAS A WIDE END AND A NARROW END, ALSO IT HAS TWO SIDES THAT INTERSECT TO MAKE A “V”. THE WEDGE IS USED BY PUTTING EFFORT ON THE WIDE END AND THE NARROW END SPLITS THE OBJECT. THE WEDGE IS USED A LOT AND IT HELPS US LIVE OUR LIVES! WRITTEN BY JARON AND BRENDAN Diagram REAL LIFE EXAMPLE PICTURE REAL LIFE EXAMPLE PICTURE REAL LIFE EXAMPLE PICTURE

6. inclined plane DEFINITION AN INCLINED PLANE IS A SLANTING SURFACE THAT IS USED TO MOVE OBJECTS TO DIFFERENT LEVELS. EX. SLIDE IT WILL BE EASIER IF YOU CAN PUSH A LOAD UP AN INCLINED PLANE INSTEAD OF LIFTING IT. MORE INCLINE+SHORTER DISTANCE=MORE WORK. LESS INCLINE+LONGER DISTANCE=LESS WORK. BY KALEIGH, DANA, & GRACE Diagram

7. screw AN INCLINED PLANE, WHICH IS ANOTHER SIMPLE MACHINE, IS RAPPED AROUND A SCREW. A SCREW INCLUDES A HEAD, A SLOT AT THE TOP, AND A POINTED TIP AT THE BOTTOM. A SCREW JOINS TWO OR MORE OBJECTS TOGETHER. LARGE SCREWS HOLD PIECES OF FURNITURE TOGETHER. SMALLER SCREWS HOLD PARTS OF TOYS TOGETHER. FINALLY, THE SMALLEST OF ALL SCREWS HOLD TOGETHER EYE GLASS FRAMES. BY: NICOLE W, CORINNE L, AND JEN F. Diagram REAL LIFE EXAMPLE PICTURE REAL LIFE EXAMPLE PICTURE REAL LIFE EXAMPLE PICTURE

8. Wheel and Axle A WHEEL HAS A SMALL OPENING IN THE MIDDLE THAT THE AXLE SLIDES INTO. THE AXLE IS A ROD IN THE CENTER OF A WHEEL. THERE ARE TWO DIFFERENT WAYS THAT A WHEEL AND AXLE WORK TOGETHER. ONE WAY THE WHEEL AND AXLE WORK WHEN THE AXLE MOVES, THE WHEEL GOES WITH IT AND KEEPS IT ON TRACK. OR THE AXLE IS HELD IN ONE PLACE AND THE WHEEL SPINS AROUND IT! BY: JACOB AND MAX! Diagram REAL LIFE EXAMPLE PICTURE REAL LIFE EXAMPLE PICTURE REAL LIFE EXAMPLE PICTURE

9. Pulley DEFINITION A PULLEY IS A WHEEL THAT HAS A ROPE LOOPED AROUND IT. THE ROPE FITS INTO A GROOVE THAT RUNS AROUND THE EDGE OF A WHEEL. THE GROOVE HELPS THE ROPE STAY IN PLACE. YOU HAVE TO PULL THE END OF THE ROPE IN ORDER TO MOVE THE LOAD. SIENA AND KATHERINE Diagram REAL LIFE EXAMPLE PICTURE REAL LIFE EXAMPLE PICTURE

11. Please join us in the cafeteria for our Invention Convention. Thank you for coming!!! Thank you for coming!!! Thank you for coming!!!