Reading Metrics
Grade Level
Middle Grades (MG 4-8)
Book Level
6.9
Points
4.0
Fiction/Nonfiction
Nonfiction
Word Count
21769
Points per Word
0.000184
Page Count
96
Points per Page
0.041667
Description
This book profiles more than thirty inventions, describing why they were invented and including information on how they have influenced human life, and includes biographical information on a number of inventors.