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Simple Machines
Dominick's Grade 5 Science Unit on Simple Machines
Question | Answer |
---|---|
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. |