Simple Machines

Simple Machines

by Dana Meachen Rau


View All Available Formats & Editions
Choose Expedited Shipping at checkout for guaranteed delivery by Thursday, October 17


How did workers in ancient civilizations move the huge stones they used to build cities?

They rolled the stones over logs much like a modern-day conveyor belt.

Inside, You'll Find:

How humans have used simple machines throughout history;

A timeline, photos-and how simple machines can be combined to do different jobs;

Surprising True facts that will shock and amaze you!

Product Details

ISBN-13: 9780531265864
Publisher: Scholastic Library Publishing
Publication date: 09/01/2011
Series: Scholastic True Book Series: Physical Science
Pages: 48
Sales rank: 757,105
Product dimensions: 6.90(w) x 8.20(h) x 0.20(d)
Age Range: 7 - 9 Years

Table of Contents

1 Easy Does It

How do simple machines make work easier? 7

2 Getting Around

How do wheels and pulleys work? 15

3 Lift and Lower

How do levers move loads? 23

So Many Simple Machines!

Can you find simple machines at an amusement park? 28

4 Ramp it Up

How do inclined planes help raise objects higher? 31

5 Break Apart and Hold Together

How do wedges and screws convert forces? 35

True Statistics 43

Resources 44

Important Words 46

Index 47

About the Author 48

Customer Reviews

Most Helpful Customer Reviews

See All Customer Reviews