1. Simple Machines

2. Machine Machine- A tool used to make work easier.

3. Simple Machine Simple Machine- Simple tools used to make work easier.

4. Compound Machine Compound Machine- Two or more simple machines working together to make work easier.

5. Work Work- A force acting on an object to move it across a distance.

6. 7 types of simple machines

7. Inclined Plane Incline Plane- A flat surface that is slanted to help move objects over a distance.

8. Wedge Wedge- The pointed edge of an inclined plane. Used to push things apart.

9. Screw Screw- An inclined plane wrapped around a cylinder.

10. Lever Lever- An arm that pivots (turns) against a fulcrum.

11. Wheel and Axle Wheel and Axle- The rotation of a lever against a point, moving an object across a distance. The wheel turns the axle.

12. Pulley Pulley- The use of a wheel to rotate a rope or cord. The cord wraps around the wheel, and as the wheel rotates, the rope move in either direction.

13. Gear Gear- Two toothed wheels that fit together so that one moves the other.