Wedges

By Joanne Mattern

Wedges were some of the first tools humans ever created Today, these simple machines are found all around, from doorstops to our own front teeth. Diagrams and simple text explain how wedges work, while experiments allow readers test the machines for themselves. Move through the history of wedges, from hand axes to handsaws, in this fascinating title for beginning readers.

• Format: Library Binding
• Language: English
• ISBN: B0GMZ9BGSL
• ISBN13: 9798855085815
• Release Date: August 2019
• Publisher: Bound to Stay Bound Books
• Length: 24 Pages
• Age Range: 5 to 8 years
• Grade Range: Preschool to Grade 3