Reading Metrics
Grade Level
Middle Grades (MG 4-8)
Book Level
7.7
Points
1.0
Fiction/Nonfiction
Nonfiction
Word Count
7529
Points per Word
0.000133
Page Count
64
Points per Page
0.015625
Series
Evolving Technology
Description
This book chronicles how, since the Neolithic era of the Stone Age, agricultural tools have evolved from pointed digging sticks to electron microscopes.