Simple text, illustrations, and hands-on activities introduce children to simple machines, discussing screws and describing their various functions.
Details
ISBN: 032973203X
ISBN: 0778744698
ISBN: 0778744868
ISBN: 9780329732035 (Follett bdg.)
ISBN: 9780778744696 (lib. bdg. : alk. paper)
ISBN: 9780778744863 (pbk. : alk. paper)
Physical Description:32 p. : ill. (chiefly col.) ; 29 cm.print
Publisher:New York : Crabtree Pub., c2009.
Bibliography, etc. Note: Includes bibliographical references (p. 32) and index.
Formatted Contents Note: What is a simple machine? -- Wrap it Up! -- Parts of a screw -- How a screw works -- Fastening and joining -- Fun with fastening! -- Raising and lowering -- Other uses of screws -- Screws and screwdrivers -- Working with screws -- Finding the pitch! -- Simple machines working together -- The history of screws -- Glossary.