Reading Metrics
Grade Level
Middle Grades (MG 4-8)
Book Level
6.3
Points
1.0
Fiction/Nonfiction
Nonfiction
Word Count
4375
Points per Word
0.000229
Page Count
32
Points per Page
0.03125
Description
For many centuries, warships were key to a nation's power. Read about how sailing ships fought for control of the oceans and about the coming of iron and steel warships. Also find out what life is like in a nuclear submarine.