6 Simple Machines
Screw
A screw is an inclined plane wrapped around a pole which holds things together or lifts materials.
Lever
A lever is a stiff bar that rests on a support called a fulcrum which lifts or moves loads.
Wheel & Axel
A wheel with a rod, called an axle, through its center lifts or moves loads.
Wedges
A wedge is an object with at least one slanting side ending in a sharp edge, which cuts material apart
Inclined Planes
An inclined plane is a slanting surface connecting a lower level to a higher level.
Pulley
A pulley is a simple machine that uses grooved wheels and a rope to raise, lower or move a load.