axles

Outlines the characteristics and advantages of a wheel and axle and highlights a variety of ways this simple machine is used in real-world situations. Features several hands-on activities, full-color photographs, and a glossary.

Describes many different kinds, uses, and benefits of wheels and axles.

Uses everyday examples to show how wheels and axles are simple machines that make carrying, pushing, and mixing easier.

Explains how wheels and axles work, presents examples of wheels and axles in the past and in everyday contemporary life, and includes a related activity.

Defines wheels and axles and shows how they are used in everyday life.