Reading Metrics
Grade Level
Middle Grades (MG 4-8)
Book Level
7.3
Points
1.0
Fiction/Nonfiction
Nonfiction
Word Count
8099
Points per Word
0.000123
Series
Classification
Description
This book examines the similarities and differences between the five classes of vertebrates, or animals with backbones: fish, amphibians, reptiles, birds, and mammals.