Reading Metrics
Grade Level
Middle Grades (MG 4-8)
Book Level
6.2
Points
1.0
Fiction/Nonfiction
Nonfiction
Word Count
4013
Points per Word
0.000249
Page Count
32
Points per Page
0.03125
Series
Prehistoric Field Guides
Description
More than three billion years ago, life began on Earth. Join Ackerley, your friendly guide, on an adventure through the Precambrian, Devonian, Carboniferous, and Permian chapters of the incredible story of evolution.