00956cam a2200277 4500 357745426 TxAuBib 981210s1992||||||||||||||||||||||||eng|u 92052814 9781564581181 $7.99 1564581187 $7.99 (OCoLC)25631747 TxAuBib Evans, David, 1937- Make it balance / David Evans and Claudette Williams. 1st American ed. New York : Dorling Kindersley, 1992. 29 p. : col. ill. ; 25 cm. Let's explore science. Includes index. Summary: Investigates, through simple experiments, the basic principles of balance and explores the concepts of gravity, mass, force, and weight. Balance Experiments. Williams, Claudette. Let's explore science. QS7