Explains the science of how screws work, discussing real-life examples such as nuts and bolts, corkscrews, faucets, and tunnel borers, and includes activities that illustrate the principles covered.
An exploration of screws that defines what they are; discusses their parts, how they work, their history, and how they are used; and includes a related experiment.
A photographic introduction to screws for beginning readers, explaining what screws are and how they work, looking at examples of screws, and discussing the use of screws in complex machines.
Describes work, machines, inclined planes, gravity and friction, and wedges in everyday surroundings, and presents experiments that explain how they work.
Outlines the characteristics and advantages of a screw 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.
Presents a children's book for early readers that describes the various types of screws and the jobs they do includes small screws and augers, which are used for digging large holes.
Presents a description of screws, in simple text with photographs, and explains how they are used and how they have been incorporated into more complex machines.
Explains what a screw is; shows how screws were used in ancient Egypt, Greece, and Rome; presents examples of everyday items that screws hold together; and includes a related activity.
