Reading Metrics
Grade Level
Middle Grades (MG 4-8)
Book Level
7.1
Points
1.0
Fiction/Nonfiction
Nonfiction
Word Count
6188
Points per Word
0.000162
Page Count
64
Points per Page
0.015625
Series
See and Explore Library
Description
An introduction to simple and complex machines, and their many uses at work, home, on the farm, and in factories.