Powerful Machines

by Gerry Bailey

From a simple pair of scissors to a complex rocket launcher, it is hard to imagine a world without machines. But did you know that almost every powerful machine is based on one or more of just six simple machines? Learn all about how these six simple concepts have shaped our world today.

• Format: Library Binding
• Language: English
• ISBN: 1433900351
• ISBN13: 9781433900358
• Release Date: January 2009
• Publisher: Gareth Stevens Publishing
• Length: 32 Pages
• Weight: 0.60 lbs.
• Dimensions: 0.3" x 7.8" x 10.0"
• Age Range: 7 to 11 years
• Grade Range: Grades 2 to 6