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Simple Machines

Dominick's Grade 5 Science Unit on Simple Machines

What is a machine? A machine is a device that makes work easier.
What is a fulcrum? The fixed point around which a lever pivots.
What is a lever? A simple machine made up of a bar that turns or pivots around a fixed point.
What is a pulley? A simple machine that uses grooved wheels and a rope or chain to raise, lower or move a load.
What is a wheel and axle? A simple machine made up of two wheels that turn or pivot around the same point.
What is a compound machine? A machine that is made up of two or more simple machines.
What is an inclined plane? A simple machine with a sloping surface, which lessens the amount of force needed to move a load.
What is mechanical advantage? The number of times that a machine multiplies the effort force applied to it.
What is a gear? A wheel with teeth.
What are the three parts of a lever? The force, the fulcrum and the load.
What is a simple machine? A machine with few or no moving parts.
What is an axle? A wheel with a rod through its center.
What is a screw? An inclined plane wrapped around a pole which holds things together or lifts materials.
What is a wedge? An object with at least one slanting side, ending in a sharp edge, which cuts materials apart.
Created by: DominickB