This book is part of a book series called Gareth Stevens Vital Science-Earth Science .

This book has been graded for interest at 11-13 years.

There are 48 pages in this book. This book was published 2007 by Gareth Stevens Publishing .

Barbara J. Davis has written books on science topics for kids for more than 15 years. She has published books on ecosystems and biomes, as well as on earth science subjects.