Reading Metrics
Grade Level
Lower Grades (LG K-3)
Book Level
1.8
Points
0.5
Fiction/Nonfiction
Nonfiction
Word Count
172
Points per Word
0.002907
Page Count
24
Points per Page
0.020833
Description
Is it easier to move a heavy box with an inclined plane or wheels and axles? Young readers will learn about how simple machines work.