How it does happen? 

 - 192 pages :  color illustrations ;  cm 
 - Childcraft : the how and why library ; #4 .
 - Childcraft : the how and why library ; #4. .
<br/><br/> Includes glossary and index 
<br/><br/> Primary 
<br/><br/><label>ISBN: </label>9780716622574 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Physical science--Juvenile literature<br/>Science--Juvenile literature
<br/><br/><label>Dewey Class. No.: </label>500