Simple Machines


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 ...

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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!

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Editorial Reviews

School Library Journal
Gr 3–5—These attractive volumes will grab children's attention from the get-go. Eye-catching covers feature dramatic demonstrations of the topics, be it an image of upside-down skydivers plummeting through the clouds in Gravity or a child with his hair sticking straight up in Electricity. Each book opens with a challenge to "Find the Truth!": "Everything you are about to read is true except for one of the sentences on this page," and then encourages readers to find out which statement is false by reading on. What follow are four or five well-organized, clearly written chapters explaining the nature of the subject, the history of its discovery, and how it impacts our lives. Every title concludes with a page of statistics and resources, such as organizations and places to visit. Excellent choices for both reports and general interest.
Children's Literature - Remy Dou
Machines dominate every aspect of human life. Since its earliest civilizations, mankind has taken advantage of machines to facilitate difficult tasks. The most basic types of machines are called simple machines. Six main kinds of simple machines help people do everything from moving heavy equipment (e.g. wheels on a dolly) to lifting things (e.g. levers for raising sails on a boat). Rau's simple narrative style clearly conveys this kind of information. Nevertheless, the majority of the concepts covered fall significantly outside of the range suggested for students by both national and state science standards across the country. Although purposely geared to the upper elementary classroom, little has been done to understand the needs of elementary educators. Rather than helping scaffold smaller chunks of information, the text offers an overwhelming torrent of facts a mile wide but only an inch deep. Although an academic expert consulted on the content, more focus should have been given to childhood education expertise. Those willing to press forward despite these challenges will discover layouts and photographs that mislead or misrepresent information. Its complexity makes this resource inappropriate for the elementary classroom and its lack of depth diminishes the value it would have at the middle school level. Part of the "True Book" series. Reviewer: Remy Dou
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Product Details

  • ISBN-13: 9780531265864
  • Publisher: Scholastic Library Publishing
  • Publication date: 9/1/2011
  • Series: A True Book
  • Pages: 48
  • Sales rank: 445,159
  • Age range: 7 - 9 Years
  • Product dimensions: 6.90 (w) x 8.20 (h) x 0.20 (d)

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

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