Reading Metrics
Grade Level
Middle Grades (MG 4-8)
Book Level
6.1
Points
1.0
Fiction/Nonfiction
Nonfiction
Word Count
3927
Points per Word
0.000255
Page Count
32
Points per Page
0.03125
Description
This book examines the human skeletal and muscular systems, explaining what cartilage is, why we have joints, and how exercise helps bones and muscles.