Electricity , livre ebook

pages

English

Ebooks

2013

Écrit par
Richard Spilsbury , Louise Spilsbury

Publié par
Capstone Global Library

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pages

English

Ebooks

2013

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Obtenez un accès à la bibliothèque pour le consulter en ligne En savoir plus

Publié par

Capstone Global Library

Date de parution

18 juillet 2013

Nombre de lectures

EAN13

9781406270174

Langue

English

Poids de l'ouvrage

23 Mo

We depend on electricity in nearly every facet of our daily lives. But what exactly is electricity, how do we generate it, and how can we use it? This book explores the phenomenon that keeps the modern world up and running.

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Publié par

Capstone Global Library

Date de parution

18 juillet 2013

Nombre de lectures

EAN13

9781406270174

Langue

English

Poids de l'ouvrage

23 Mo

Essential Physical Science

Louise and Richard Spilsbury

Raintree is an imprint of Capstone Global Library Limited, a company incorporated in England and Wales having its registered oce at 7 Pilgrim Street, London, EC4V 6LB – Registered company number: 6695582

To contact Raintree, please phone 0845 6044371, fax +44 (0)1865 312263, or email myorders@ raintreepublishers.co.uk

All rights reserved. No part of this publication may be reproduced in any form or by any means (including photocopying or storing it in any medium by electronic means and whether or not transiently or incidentally to some other use of this publication) without the written permission of the copyright owner, except in accordance with the provisions of the Copyright, Designs, and Patents Act 1988 or under the terms of a licence issued by the Copyright Licensing Agency, Saron House, 6–10 Kirby Street, London EC1N 8TS (www.cla.co.uk). Applications for the copyright owner’s written permission should be addressed to the publisher.

Edited by Nancy Dickmann, Adam Miller, and Diyan Leake Designed by Victoria Allen Original illustrations © Capstone Global Library Ltd 2014 Illustrated by H L Studios Picture research by Ruth Blair Originated by Capstone Global Library Ltd Printed and bound in China by CTPS

ISBN 978 1 406 25988 9 17 16 15 14 13 10 9 8 7 6 5 4 3 2 1

British Library Cataloguing in Publication Data Spilsbury, Louise. Electricity. -- (Essential physical science) 1. Electricity--Juvenile literature. 2. Electric power production--Juvenile literature. I. Title II. Series III. Spilsbury, Richard, 1963- 333.7’932-dc23

AcknowledgementsWe would like to thank the following for permission to reproduce photographs: Alamy pp. 24 (© JoeFox Liverpool), 27 (© Dave Pattison), 37 (© Urbanmyth), 41 (© Andrew Shurtle ); Capstone Publishers (© Karon Dubke) pp. 14, 15, 16, 19, 22, 23, 28, 29, 34, 34, 35; Corbis pp. 17 (© Sam Sharpe/The Sharpe Image), 26 (© Anthony Redpath), 38 (© Ocean), 42 (© Frederic Courbet); Getty Images pp. 4 (Peter Wafzig), 5 (Robert Giroux), 6 (Oxford Scientic), 9 (Photolibrary), 12 (Fuse), 18 (JGI/Jamie Grill), 30 (Nick Veasey), 36 (Peter Anderson); © Makani Power, A. Dunlap, 2011 p. 4; Shutterstock pp. 7 (© Violet Kaipa), 11 (© Patrick Poendl), 13 (© Kurhan), 25 (© Kurhan), 31 (littleny), 39 (© Photoseeker), 40 (© pirita).

Cover photograph of the light trails on the modern building background in Shanghai, China, reproduced with permission of Shutterstock (© zhangyang13576997233).

Every eort has been made to contact copyright holders of material reproduced in this book. Any omissions will be rectied in subsequent printings if notice is given to the publisher.

Disclaimer All the internet addresses (URLs) given in this book were valid at the time of going to press. However, due to the dynamic nature of the internet, some addresses may have changed, or sites may have changed or ceased to exist since publication. While the author and publisher regret any inconvenience this may cause readers, no responsibility for any such changes can be accepted by either the author or the publisher.

Contents

What is electricity? . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4 Where does electricity come from? . . . . . . . . . . . . . . . . . . . . 6 How do batteries work? . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12 How does electricity move? . . . . . . . . . . . . . . . . . . . . . . . . . 16 What can electricity flow through? . . . . . . . . . . . . . . . . . . . . 24 How do we use electricity?. . . . . . . . . . . . . . . . . . . . . . . . . . 30 Is electricity safe? . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 38 Electricity in the future . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 42 Glossary . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 44 Find out more. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 46 Index. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 48

Eureka moment! Learn about important discoveries that have brought about further knowledge and understanding.

Some words are shown in bold,like this. You can find out what they mean by looking in the glossary.

i know Discover fascinating facts about electricity.

WHAT’S NEXT?

Read about the latest research and advances in essential physical science.

What is electricity? Electricity is a form ofenergythat we use to power most of the machines we use every day. It is the flow of electrical power from tiny parts calledatoms. Everything in the world is made up of atoms, which are so small we cannot see them. Even I L I N the tiniest things have an enormous number of atoms. For example, a grain of salt has around 10,000 trillion atoms!

andneutrons protons An atom is made of three types of parts: that travel round and round them very electrons at its centre, and quickly. Electricity occurs when electrons flow from atom to atom.

Then and now Before people discovered how to make electricity, they kept warm by burning wood or coal in fireplaces. They used candles and oil lamps to light their homes, and ice to keep food cold. Today we use electricity to power lights, fridge-freezers, televisions, computers, and many other machines. We take electricity for granted – but life would be very different without it!

Electric lights and instruments help to make live rock shows loud, colourful, and exciting for massive audiences.

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