Reading Metrics
Grade Level
Middle Grades (MG 4-8)
Book Level
8.0
Points
1.0
Fiction/Nonfiction
Nonfiction
Word Count
6738
Points per Word
0.000148
Page Count
39
Points per Page
0.025641
Series
Exploring the Solar System
Description
This book takes you on a mission to Mercury. Fly over the second-largest impact crater in the solar system, explore the deep cracks in Mercury's crust, and find out why a day lasts longer than a year on this tiny planet.