2. A Simple machine helps us do work EASIER.

3. A simple machine has few or no moving parts.
There are 6 types of simple machines.

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

5. Inclined Planes

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

7. WEDGE
A saw an ax, 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.

11. LEVER
A wheel barrow, a hammer, a see saw, and nail clippers are other examples of levers.

12. WHEEL AND AXLE
The wheel and axle is made up of a wheel connected to a post (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. Doorknobs too.

14. 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 lift heavy objects.

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

16. Complex machines…
Simple machines can be put together to create complex machines that do all sorts of things!

17. Can you find any simple machines around the classroom???