1. Making Things Work
Simple Machines
4th grade

2. Table of Contents Other Types of Simple Machines
Georgia Performance Standards
Types of Simple Machines Organizer
Inclined Plane
types of inclined planes
Wedge
types of wedges
Levers
types of levers
Screws
types of screws
Pulleys
types of pulleys
Wheels and axles
types of wheels and axles
Other Types of Simple Machines
Simple Machines in Our Homes
Simple Machines at Work
Pulleys and Inclined Planes
Levers
Resources
How Do You Move a Lion?
Closing Slide

3. Georgia Performance Standard
S4P3. Students will demonstrate the relationship between the application of a force and the resulting change in position and motion on an object.
a. Identify simple machines and explain their uses. (lever, pulley, wedge, inclined plane, screw, wheel and axle)

4. Types of Machines

5. Inclined Plane
An inclined plane is a flat surface set at an angle to another surface.
Where do you find inclined planes?
How might you use an inclined plane?

6. Inclined Plane
An inclined plane is used to make moving things up and down easier.
Inclined planes are ramps, slides, and stairs; many others, too.

7. Wedge
A wedge is two inclined planes stuck back to back. A wedge is wide at one end and tapers to a point at the other.
Where might you find wedges?
How might you use a wedge?

8. Wedge
Wedges are used to separate things by cutting, piercing, or splitting the objects.
Knives, doorstops, saws and scissors are all types of wedges.

9. Levers A lever is a bar that moves on or around a fixed point.
Where do you find levers?
How can you use a lever?

10. Levers Levers, levers everywhere!
A lever is used for raising or moving heavy objects.
See-saws, push bars, hammers, bottle openers, and pop-tops on soda cans are all levers!

11. Screw A screw is an inclined plane that curves around a pole.
Where do we find screws?
How do we use screws?

12. Screw A screw is used to hold things together.
Screws are all around us! Bottle tops, bolts, and even the end of light bulbs are all types of screws!

13. Pulley
A pulley is a rope over a wheel. It changes the direction of the force you use.
Where do we find pulleys?

14. Pulley
A pulley makes it easier to move objects up, down, and across a long distance. The more pulleys you combine, the less force you need to move an object.
A flagpole is a type of pulley.

15. Wheel and Axle
A wheel and axle is a machine that has a bar through the middle of a wheel.
Where do we find wheels and axles?
Why do we use wheels and axles?

16. Wheel and Axle When the wheel is turned, the axle turns, too.
Doorknobs, tape dispensers, pencil sharpeners, and automobiles all use wheels and axles.

17. Other Examples of Simple Machines
Inclined plane
Wedge
Levers
Screw
Pulley
Wheel and axle
slide
kitchen
knife
light switch
tornado slide
cranes
pizza
cutter
wheel-chair ramp
doorstop
broom
Coke bottle top
sailboat
sails
fishing
pole

18. Simple Machines in Our Houses
Annie’s House
Anthony’s House

19. Simple Machines at Work
Pulleys and Inclined Planes

20. More Simple Machines at Work
Levers

21. Back to table of contents
Resources
Websites
Books
Simple Machines by Allan Fowler
The Wheeling and Whirling Around Book by Judy Hindley
How Do You Lift a Lion? By Robert E. Wells (see the book cover on the next slide)
Back to table of contents

23. Don’t you just
Simple Machines?!