2. gravity
• Gravity is a force that pulls two objects
together on earth. If we did not have gravity
we would be floating in space.

3. force
• Force is when you use a push or a pull on
something

4. work
• Work is the abilty to push or pull.

5. Simple Machines
• A simple machine is something that makes it
easy to do work a screw driver is a simple
machine.

6. Friction
• Friction is something that is caused when two
objects rub together like a car rubs on the
ground.

7. THE END!