Screws (Machines in Action)

By Angela Royston

Book Overview

Why is a spiral staircase easier to climb? How can a screw lift a heavy car? What is a propeller for? Screws have been sued for over 2,000 years as a simple machine that can make other machines work.... This description may be from another edition of this product.

• Format: Paperback
• Language: English
• ISBN: 1403440875
• ISBN13: 9781403440877
• Release Date: July 2003
• Publisher: Heinemann
• Length: 32 Pages
• Weight: 0.25 lbs.
• Dimensions: 10.3" x 0.3" x 7.5"
• Age Range: 8 to 10 years
• Grade Range: Grades 3 to 5