1. The 6 Simple Machines Screw Wedge Inclined Plane Pulley Wheel and Axle
Lever

2. Mechanical Advantage
Mechanical advantage is the ratio of output force divided by input force. If the output force is bigger than the input force, a machine has a mechanical advantage greater than one.
If a machine increases an input force of 10 pounds to an output force of 100 pounds, the machine has a mechanical advantage (MA) of 10.
In machines that increase distance instead of force, the MA is the ratio of the output distance and input distance.
MA = output/input

3. Inclined Planes
An inclined plane is a flat surface that is higher on one end
Inclined planes make the work of moving things easier
A sloping surface, such as a ramp. An inclined plane can be used to alter the effort and distance involved in doing work, such as lifting loads. The trade-off is that an object must be moved a longer distance than if it was lifted straight up, but less force is needed. You can use this machine to move an object to a lower or higher place.  Inclined planes make the work of moving things easier.  You would need less energy and force to move objects with an inclined plane. 

4. Inclined Plane - Mechanical Advantage
The mechanical advantage of an inclined plane is equal to the length of the slope divided by the height of the inclined plane.
While the inclined plane produces a mechanical advantage, it does so by increasing the distance through which the force must move.

5. WHEEL AND AXLE
The axle is stuck rigidly to a large wheel. Fan blades are attached to the wheel. When the axle turns, the fan blades spin.

6. GEARS-Wheel and Axle
Each gear in a series reverses the direction of rotation of the previous gear. The smaller gear will always turn faster than the larger gear.
Mechanical advantage can also be found by comparing the teeth of each gear, input teeth / output teeth

7. The Lever
Lever, is one of the six simple machines for performing work. It consists of a rod or bar that rests and turns on a support called a fulcrum. A force of effort is applied at one end of the rod to lift a load placed at the other end. A lever can help lift a weight with less effort. Prying something loose with a crowbar is using a lever. Some machines, such as a catapult, use a lever to hurl objects.

8. Three Classes of Levers
First-class levers – the fulcrum is in the middle like a seesaw,crowbar, or balance scale.
Second-class levers- the load is in the middle like a wheel barrow, or a nutcracker.
Third-class levers – the effort is in the middle like a broom or a rake.

10. Screw
Screw is an inclined plane wrapped in a spiral around a shaft. The screw is one of the six simple machines developed in ancient times.

11. Wedge
Wedge is a device that has two or more sloping surfaces that taper either to a sharp edge or to a point. Wedges are used to split or pierce materials, and to adjust the positions of heavy objects. Knives, chisels, axes, pins, needles, and nails are wedges.