Reading Metrics
Grade Level
Middle Grades (MG 4-8)
Book Level
8.2
Points
2.0
Fiction/Nonfiction
Nonfiction
Word Count
8380
Points per Word
0.000239
Page Count
58
Points per Page
0.034483
Description
Readers can follow the course of NASA's Mars Exploration Rover (MER) mission as twin rovers, "Spirit" and "Opportunity," explore the Red Planet.