文档介绍：i-01-LBO-861776 08/24/2004 10:17 AM Page i
V. Cary Wolinsky/Stock Boston/PictureQuest
i-01-LBO-861776 08/24/2004 10:17 AM Page ii
Waves, Sound,
and Light
The amount of light energy
emitted determines the color of
fireworks. Common substances
used are strontium or lithium
salts for red, calcium salts for
orange, pounds for
yellow, barium chloride for
green, copper chloride for blue,
and strontium and copper
compounds for purple.
Copyright © 2005 by The McGraw-panies, rights as permitted under
the United States Copyright Act,no part of this publication may be reproduced or distributed in any
form or by any means,or stored in a database or retrieval system,without prior written permission
of the publisher.
The National Geographic features were designed and developed by the National Geographic Society’s
Education © National Geographic name “National Geographic Society”
and the Yellow Border Rectangle are trademarks of the Society,and their use,without prior written
permission,is strictly prohibited.
The “Science and Society”and the “Science and History”features that appear in this book were
designed and developed by TIME School Publishing,a division of TIME and the red
border are trademarks of Time rights reserved.
Send all inquiries to:
Glencoe/McGraw-Hill
8787 Orion Place
Columbus,OH 43240-4027
ISBN:0-07-861776-6
Printed in the United States of America.
2 3 4 5 6 7 8 9 10 027/111 09 08 07 06 05 04
V. Cary Wolinsky/Stock Boston/PictureQuest
i-01-LBO-861776 08/24/2004 10:18 AM Page iii
Authors
Nicholas Hainen Dinah Zike
Chemistry/Physics Teacher, Retired Educational Consultant
Education Division Worthington City Schools Dinah-Might Activities, Inc.
Washington, . Worthington, OH San Antonio, TX
Cathy Ezrailson Deborah Lillie
Science Department Head Math and Science Writer
Academy for Science and Health Sudbury,