Reading Metrics
Grade Level
Middle Grades (MG 4-8)
Book Level
6.4
Points
1.0
Fiction/Nonfiction
Nonfiction
Word Count
7057
Points per Word
0.000142
Page Count
48
Points per Page
0.020833
Description
This book explains how geologic time is the timeline of Earth's evolution. Scientists use sedimentary rock layers, fossils, relative dating, and absolute dating to piece together the history of life on the planet.