Reading Metrics
Grade Level
Lower Grades (LG K-3)
Book Level
3.6
Points
0.5
Fiction/Nonfiction
Nonfiction
Word Count
669
Points per Word
0.000747
Page Count
24
Points per Page
0.020833
Description
This introduction to helicopters discusses the science behind how they fly, examines the parts and types of helicopters, and reviews the history of their development.