Scissors are composed of two different types of simple machines: wedge and lever. The scissors' blades are sharpened into wedges, and the arms that are squeezed together are levers.
There are six basic simple machines. These are the lever, screw, inclined plane, wedge, wheel and axle, and the pulley. The lever is used to lift an object, and it is more efficient when used with a fulcrum. The screw allows an object to move from a lower position to a higher one. It can also be used to hold objects in place. The inclined plane helps things go from either a lower position to a higher one, or a higher position to a lower one by moving up a ramp. The wedge is used to separate objects or hold them together. The wheel and axle allows objects to be moved by the wheel rotating around the axle. The pulley is used to lift or lower heavy objects.