Reading Metrics
Grade Level
Middle Grades (MG 4-8)
Book Level
9.4
Points
3.0
Fiction/Nonfiction
Nonfiction
Word Count
14966
Points per Word
0.0002
Page Count
72
Points per Page
0.041667
Series
Inventions and Inventors
Description
This book describes the inventions that make air travel possible, from balloons and airships to jet planes and space shuttles.