Reading Metrics
Grade Level
Middle Grades (MG 4-8)
Book Level
9.0
Points
4.0
Fiction/Nonfiction
Nonfiction
Word Count
21767
Points per Word
0.000184
Page Count
112
Points per Page
0.035714
Description
This book describes the role that collisions with meteors, comets, and asteroids have played in the history of Earth and other planets in the solar system and examines what is being done to protect Earth from future collisions.