Reading Metrics
Grade Level
Middle Grades (MG 4-8)
Book Level
7.7
Points
2.0
Fiction/Nonfiction
Nonfiction
Word Count
8580
Points per Word
0.000233
Page Count
48
Points per Page
0.041667
Series
10: Physical Science
Description
This book ranks the ten most revolutionary inventions of the 21st century that have made our lives easier, healthier, and more productive.