Inclined Plane:
It is a flat surface that is higher on one end. example: ramp
Wedge:
A wedge is a simple machine used to push two objects apart. A wedge is made up of two inclined planes. example: fork
Screw:
A screw is a simple machine that is made from another simple machine. It is actually an inclined plane that winds around itself. example: screwdriver
Lever:
A lever is a simple machine. A lever is a board or bar that rests on a turning point. example: see-saw
Pulley:
This simple machine is made up of a wheel and a rope. The rope fits on the groove of the wheel. example: elevator
Wheel and axle:
The axle is a rod that goes through the wheel. This lets the wheel turn. example: wagon
A screwdriver is not a screw, it is a type of wedge. Also, all six machines fit into three catagories: The Inclined Plane family (screw, wedge, inclined plane) and the Lever family (Wheel and axle, Pulley, Lever).
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