Nora Roman - Using Magnets

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Table of Contents

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USING MAGNETS

SUPER SCIENCE TOOLS

science

Nora Roman

.

.

SUPER SCIENCE TOOLS

USING

MAGNETS

By Nora Roman

.

Please visit our website, www. garethstevens. com. For a free color catalog of all our high-quality books, call toll free 1-800-542-2595 or fax 1-877-542-2596.

Cataloging-in-Publication Data

Names: Roman, Nora. Title: Using magnets / Nora Roman. Description: New York : Gareth Stevens Publishing, 2018. | Series: Super science tools | Includes index. Identifiers: ISBN 9781482463934 ( pbk. ) | ISBN 9781482463958 ( library bound) | ISBN 9781482463941 ( pack) Subjects: LCSH: Magnets--Juvenile literature. | Magnetic fields--Juvenile literature. Classification: LCC QC757. R66 2018 | DDC 538--dc23

Published in 2018 by Gareth Stevens Publishing East 14th Street, Suite New York, NY 10003

Copyright 2018 Gareth Stevens Publishing

Designer: Laura Bowen Editor: Therese Shea

Photo credits: Cover, p. Rubberball/Mike Kemp/Shutterstock. com; pp. 1--24 ( series art) T. Sumaetho/Shutterstock. com; p. antos777/Shutterstock. com; p. Jakinnboaz/ Shutterstock. com; p. NoPainNoGain/Shutterstock. com; p. ( top) Pat_Hastings/ Shutterstock. com; p. ( bottom) supersaiyan3/Shutterstock. com; p. ( cobalt) farbled/ Shutterstock. com; p. ( iron) Fokin Oleg/Shutterstock. com; p. ( nickel) Alchemist-hp/ Shutterstock. com; p. ( magnetite) Aleksandr Pobedimskiy/Shutterstock. com; p. ( compass) Feng Yu/Shutterstock. com; p. ( Earth) Snowbelle/Shutterstock. com; p. marekusz/Shutterstock. com; p. SpeedKingz/Shutterstock. com; p. ( girl) Rubberball/ Mike Kemp/Getty Images; p. ( magnets) GOLFX/Shutterstock. com; p. ( notebook) Raihana Asral/Shutterstock. com.

All rights reserved. No part of this book may be reproduced in any form without permission in writing from the publisher, except by a reviewer.

Printed in the United States of America

CPSIA compliance information: Batch #CS17GS: For further information contact Gareth Stevens, New York, New York at 1-800-542-2595.

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Contents

Magnets, Not Magic

In the Field

Magnetic Matter

Pointing the Way

Electromagnets All Around

Thank You, Magnets!

Glossary

For More Information

Index

Boldface words appear in the glossary

.

Magnets, Not Magic

Magnets can push and pull

things without even touching

them! They can also stick to some

objects. You probably have toys

that are magnets. Magnets are also

important tools. Magnets arent magic. So how do they work?

.

.

In the Field

All magnets are made of special metals . Even rocks that have bits

of special metal in them can act

as magnets. The metals have a

magnetic field. Thats the area

around them in which their force

can work.

.

Magnetic Fields

bar magnet

N S

N

horseshoe magnet

S

.

Every magnet has two opposite

poles, or ends, called a north

pole and a south pole. North

poles attract the south poles

of other magnets, but they repel

other north poles. South poles

attract north poles, but they

repel other south poles.

.

S

N

N

S

N

N

S

S

attract repel

.

What gives a magnet its force?

Scientists are still studying that!

They know magnetism has to do

with the atoms that make up

matter. They think parts of atoms

called electrons act a certain way

that creates a magnetic field.

.

.

Magnetic Matter

Lodestone is a rock that is a

permanent magnet. Some matter

becomes a temporary magnet

when its touching another magnet.

Iron, nickel, and cobalt are metals

used to make temporary magnets.

Some matter, such as wood, is

never magnetic.

.

cobalt

nickel

iron

lodestone

.

Pointing the Way

Magnets can help you find your way. A compass contains a magnetic needle. It points north because Earth acts as a magnet,

too! The poles of the compass

needle are attracted to and point

at the opposite poles of Earths

magnetic field.

.

Earths magnetic field

compass

.

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