Simple Machines 3rd Grade

This makes work easier and has one or no moving parts. 

• simple machine
• complex machine
• Wile E. Coyote
• anvil

This uses a grooved wheel with a rope or belt around it. It helps a person lift or move something up, down, or across an area by changing the direction of force. 

• screw
• pulley
• wedge
• cylinder

This is often used to hold things together.  

• inclined plane
• screw
• wedge
• pulley

This simple machine is 2 parts that move at the same time and both parts turn to help a person move something.  It produces rotational motion which can be turned into straight-line motion.

• wedge
• wheel and axle
• lever
• fulcrum

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

• inclined plane
• pulley
• wheel and axle
• screw

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

• lever
• wedge
• screw
• inclined plane

This is an object with a sharp edge.
It helps spread or cut something.
It is 2 inclined planes that come together to a point on one side.

• wedge
• wheel and axle
• lever
• screw

Which is an example of someone using a simple machine to do work?

• a boy runs across a football field
• a banker counts money
• a mother pushes a stroller up a ramp
• a girl reads a book

Which is a characteristic of a simple machine?

• They run on electricity.
• They take a long time to make.
• They have few or no moving parts.
• They are not very large.

Flagpole

• wedge
• pulley
• incline plane
• wheel and axle