Reading Metrics
Grade Level
Middle Grades (MG 4-8)
Book Level
6.5
Points
1.0
Fiction/Nonfiction
Nonfiction
Word Count
7309
Points per Word
0.000137
Page Count
32
Points per Page
0.03125
Series
About Time
Description
This book explores how humans have measured time throughout history, from moon calendars to sun clocks, hourglasses, and other mechanical devises to electric, electronic, and atomic timepieces.