Screws

By Sally M. Walker, Roseann Feldmann, Rosann Feldmann

Book Overview

We've all seen screws, but how do they work? Why is it easier to screw something into something than to simply push it in? with basic hands-on experiments and clear descriptions, this simple machine is explained.

• Format: Hardcover
• Language: English
• ISBN: 0822522225
• ISBN13: 9780822522225
• Release Date: January 2001
• Publisher: Lerner Publications
• Length: 47 Pages
• Weight: 0.60 lbs.
• Dimensions: 0.4" x 7.5" x 9.0"
• Age Range: 8 to 11 years
• Grade Range: Grades 3 to 6