Harris, Nancy <br/><br/>
Technology / 
Nancy Harris 
 - 24 pages :  illustrations (chiefly color) ;  24 cm 
 - Rourke's  world of science encyclopedia ; v.9 .
 - Rourke's  world of science encyclopedia ; v.9 .
<br/><br/> Includes index 
<br/><br/> Teaches the essential concepts for elementary school science instruction. Topics include the basic objects in the sky, life-cycles, and properties of earth materials to the more advanced, structures of living systems, forces and motion and science technology. This volume covers technology. 
<br/><br/> Primary 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Technology--Encyclopedias, Juvenile<br/>Science--Encyclopedias, Juvenile
<br/><br/><label>Dewey Class. No.: </label>503