Simple Machines for Kids - What are simple machines? How do machines work?

Simple Machines

Corkscrew
An example of a screw

Machines are ways to make it easier to do work. Many plants and animals have evolved natural machines like arm muscles (a kind of lever) or teeth (a kind of wedge) or a bacteria's flagellum (a kind of screw). Many animals also make machines out of dirt, wood, and stone. People make machines too. There are six different kinds of simple machines. Many of the more complicated machines we use are made of combinations of these six simple ideas.


Other machines need power to work, like car engines and computers. Here's a page about machines that use power.

To find out more about simple machines, check out these books and games from Amazon.com or from your library:

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