1. SIMPLE MACHINES LESSON
January 30, 2001
Ms. Ashby’s Third Grade Class

2. A machine is anything that helps us do work.

3. A simple machine has few or no moving parts.
There are 6 types of simple machines.
1. Inclined plane
2. Wedge
3. Screw
4. Lever
5. Wheel and Axle
6. Pulley

4. Inclined Planes
An inclined plane is a sloping surface that makes it easier to move objects to a higher or lower place.
An example of an inclined plane is a ramp.

5. Inclined Planes
A slide is also an inclined plane.

6. WEDGE
A wedge is a simple machine used to raise objects or split an object apart.
An ax is a wedge. It is used to split objects apart.

7. WEDGE
A saw and a knife are wedges also.

8. SCREW
A screw is a simple machine that is used to hold things together.

9. SCREW
A jack is another example of a screw.

10. LEVER
The lever reduces the amount of work needed to lift or move an object.
A rake is a lever used to move leaves.

11. LEVER
A wheel barrow, a bottle opener, a see saw, and a crow bar are other examples of levers.

12. WHEEL AND AXLE
The wheel and axle is a simple machine made up of a wheel connected to a post. The post is called the axle.
A wheel and axle help people lift a heavy load with less work.

13. WHEEL AND AXLE
We use wheels and axles every day. Cars use wheels and axles.

14. WHEEL AND AXLE
A doorknob is a wheel and axle .

15. PULLEY A pulley is a simple machine made
up of a wheel with a rope or cable around the wheel.
A pulley is used to raise a flag on a flagpole or to lift heavy objects.

16. PULLEY
A pulley is used to raise a flag on a flagpole. A ski lift uses a pulley also.

17. WHAT HAVE YOU LEARNED? Name the 6 types of simple machines.
Look around the computer lab. Do you see any simple machines? If you do, draw a picture of the simple machine you see.

18. THE END………