Reading Metrics
Grade Level
Lower Grades (LG K-3)
Book Level
4.9
Points
0.5
Fiction/Nonfiction
Nonfiction
Word Count
1376
Points per Word
0.000363
Page Count
48
Points per Page
0.010417
Description
This picture book biography profiles the life of Vera Rubin, one of the astronomers who discovered and named dark matter, the thing that keeps the universe hanging together.