Reading Metrics
Grade Level
Middle Grades (MG 4-8)
Book Level
7.8
Points
3.0
Fiction/Nonfiction
Nonfiction
Word Count
15474
Points per Word
0.000194
Page Count
64
Points per Page
0.046875
Series
Look At...
Description
This introduction to inventions and discoveries from ancient to modern times includes how they were developed and their effects on society.