Simple Machine: A simple machine is a basic tool that helps you do work with less effort. Examples are levers, wheels, wedges, and pulleys.
Lever: A lever is a simple machine that helps you lift heavy things. A seesaw and a hammer are both levers.
Wheel: A wheel is a round simple machine that helps things roll and move easily. Your toy truck uses wheels!
Wedge: A wedge is a simple machine with a thin edge that cuts or splits things. A knife and an axe are wedges.
Pulley: A pulley is a simple machine with a rope and wheel that helps you lift heavy things up high.
Screwdriver: A screwdriver is a simple machine that helps you turn screws into wood or other materials with more force.
Hammer: A hammer is a tool and a type of lever. You use it to push nails into wood by swinging it.
Effort: Effort is the work or force you use to do a job. Simple machines help you use less effort!