About 4 of the simple machines needed to be known by fourth graders!

1. Simple Machines
Science for Fourth Grade
By
Lindsay McGee

2. What are simple machines?
Simple machines are
any machine that
make work easier!

3. Lever
An inclined plane that rests on a fulcrum.

4. Wedge
A wedge is a triangle shaped tool that is used to
separate 2 objects.

5. Pulley
A pulley is a simple machine that uses grooved
wheels and a rope to move a load.

6. Inclined Plane
An inclined plane is a flat surface raised at an
angle like a ramp to move objects that are too
heavy to lift straight up.

7. • http://www.mikids.com/Smachines.htm
• http://www.msichicago.org/online-
science/activities/activity-
detail/activities/simple-machines-build-a-
lever/
• http://www.learnersdictionary.com/definition
/wedge
• http://www.ohio.edu/people/williar4/html/ha
ped/nasa/simpmach/Inplane.htm