Midthun, Joseph <br/><br/>
Gravity 
/ written by Joseph Midthun ; illustrated by Samuel Hiti 
 - 40 pages :  color illustrations 
 - Building blocks of physical science .
<br/><br/> "Includes online access to activities."--Cover.  Includes index. 
<br/><br/>What is a gravity? Measuring gravity Mass vs/ weight How objects fall Friction Inertia Gravity and the sun Gravity and the moon Gravity and the solar system Black holes Why study gravity Timeline Who's who : Isaac Newton Activity : bottle drop Can you believe it? Words to know 
<br/><br/><label>ISBN: </label>9780716644644 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Physical sciences--Comic books, strips, etc.--Juvenile literature<br/>Gravity--Comic books, strips, etc.--Juvenile literature
<br/><br/><label>Dewey Class. No.: </label>500.2