wheels

An exploration of wheels and axles, covering how they are used, their design, how they work, and more. Includes audio, videos, activities, weblinks, slideshows, transparencies, maps, quizzes, and supplementary resources.

An introduction to the self-propelled vehicles known as bicycles, covering their purpose, parts, and operation, and such defining features as their wheels and handlebars.

An introduction to wheels and axles that describes their parts, functions, uses, and history.

An exploration of wheels and axles, covering how they are used, their design, how they work, and more.

Through engaging text and dynamic infographics, describes the history, features, and future of funny cars.

Introduces the basic principles of wheels and axles and how they are useful.

Simple text and photographs present wheels in motion, steering, turning, digging, and rolling.

Presents information on simple machines with a focus on wheels and axles. Explains what wheels and axles are, how wheels and axles work, and includes examples of uses.

A runaway wheel takes a bouncy, bumpy, amusing journey through town.

Explains scientific concepts related to wheels, covering such topics as friction, bearings, and wheel size, and presents hands-on activities.