Reading Metrics
Grade Level
Middle Grades (MG 4-8)
Book Level
3.9
Points
0.5
Fiction/Nonfiction
Nonfiction
Word Count
1817
Points per Word
0.000275
Description
This book presents a short study of how levers, wheels and axles, pulleys, inclined planes, wedges, and screws work and the importance of these principles in various machines.