What If
Subtitle: Mind-Boggling Science Questions for Kids
Publisher: Tandem Library
Published: April 1998
Language: eng
Format: Hardcover
ISBN-13: 9780613966856
Subjects: Juvenile Nonfiction; Science & Nature - General; Science & Technology - General; Children's Books/Ages 9-12 Science; Children's 9-12 - Science
First sentence: Say you throw an apple up in the air.