Reading Metrics
Grade Level
Middle Grades (MG 4-8)
Book Level
5.9
Points
1.0
Fiction/Nonfiction
Nonfiction
Word Count
4541
Points per Word
0.00022
Page Count
48
Points per Page
0.020833
Description
Civilizations have always used scientific and technological advancements to gain an edge against rival nations. This book explores the science behind some of the most influential weapons, defenses, and modes of transportation in history.