This book is part of a book series called Profiles in Science .

This book has been graded for interest at 12-15 years.

There are 144 pages in this book. This book was published 2008 by Morgan Reynolds Publishing .

Roberta Baxter writes about science and history for students of all ages. She studied chemistry in college, but also enjoys learning about historical events and people. Her books include The Reactions of Metals, The Home Front in the North and The Home Front in the South. She lives in Colorado Springs, Colorado.