Simple Machines

A simple machine is a device that helps to reduce the amount of _____ required to work.

• force
• energy
• work

This has one or no moving parts. 

• simple machine
• complex machine

a wheel with a rope or belt around it. Helps a person lift or move something up, down, or across an area. 

• screw
• pulley

Often used to hold things together. 

• inclined plane
• screw

-moves at the same time
-both parts turn to help a person move something

• wedge
• wheel and axle

-a ramp
-flat surface that is higher at one end. 
-helps a person move something up or down from one place to another

• inclined plane
• pulley

-object with a sharp edge
-helps spread or cut something

• wedge
• wheel and axle

-a flat bar that rests on a fulcrum
-helps a person move or lift something
-example is a see-saw

• lever
• wedge

What type of simple machine is found on the cap of a pickle jar?

• lever
• inclined plane
• pulley
• screw

Which of these is an example of a wedge?

• skateboard
• broom
• stairs
• butter knife