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《Focus On Physical Science》是专为加州八年级学生设计的物理科学教科书，涵盖运动与力、物质结构和化学反应等核心内容，并结合了Palomar天文台的实际案例。该资料包括丰富的在线学习资源和互动工具，帮助学生更好地理解和掌握物理学知识。

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New York, New York Columbus, Ohio Chicago, Illinois Peoria, Illinois Woodland Hills, California

Focus On Physical Science
The Palomar Observatory in north San
Diego County is home to many telescopes
including the Hale Telescope. The 5.1m Hale
Telescope is used nightly for astronomical
studies.

Copyright © 2007 by The McGraw-Hill Companies, Inc. All rights reserved. Except 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 National Geographic’s Children’s
Books and Education Division. Copyright © National Geographic. The name “National Geographic”
and the Yellow Border Rectangle are trademarks of National Geographic and their use, without prior
written permission, is strictly prohibited.

Send all inquiries to:
Glencoe/McGraw-Hill
8787 Orion Place
Columbus, OH 43240-4027

ISBN-13: 978-0-07-879440-7
ISBN-10: 0-07-879440-4

Printed in the United States of America.

3 4 5 6 7 8 9 10 079/043 10 09 08 07

Science
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Study Tools

•

• Interactive Tables

• Interactive Time Line

• Animated Illustrations
• Lesson Self-Check Quizzes
• Chapter Test Practice
• Standardized Test Practice
• Vocabulary PuzzleMaker
• Interactive Tutor
• Multilingual Science Glossary
• Study to Go
• Online Student Edition
•
BrainPop Movies

Extensions
• Virtual Labs
• Microscopy Links
• Periodic Table Links
• Career Links
• Prescreened Web Links
• WebQuest Project
• Science Fair Ideas
• Internet Labs

For Teachers
• Teacher Bulletin Board
• Teaching Today, and much
more!

Check out the following features on your
Online Learning Center:

ca8.msscience.com

iii
Introduction to Investigation and
Experimentation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2
9.a, 9.b, 9.c, 9.e, 9.f, 9.g
Unit 1
Motion and Forces . . . . . . . . . . . . . . . . . . . . .42
Chapter 1 Motion . . . . . . . . . . . . . . . . . . . . . . . . . . . 44
1.a, 1.b, 1.c, 1.d, 1.e,
1.f, 9.b, 9.d, 9.e, 9.f
Chapter 2 Forces . . . . . . . . . . . . . . . . . . . . . . . . . . . 84
2.a, 2.b, 2.c, 2.d, 2.e,
2.f, 9.a, 9.d, 9.g
Chapter 3 Density and Buoyancy . . . . . . . . . .126
8.a, 8.b, 8.c, 8.d, 9.f
Unit 2
Structure of Matter . . . . . . . . . . . . . . . . . . .168
Chapter 4 Understanding the Atom . . . . . . . . .170
3.a, 3.f, 7.b, 9.e
Chapter 5 Combining Atoms and Molecules .214
3.a, 3.b, 3.c, 3.f, 7.c, 9.a, 9.e
Chapter 6 States of Matter . . . . . . . . . . . . . . . . .250
3.d, 3.e, 9.e, 9.g
Chapter 7 The Periodic Table and
Physical Properties . . . . . . . . . . . . . .286
3.f, 5.d, 7.a, 7.b, 7.c, 9.a, 9.e
Unit 3
Chemical Interactions . . . . . . . . . . . . . . . . .332
Chapter 8 Chemical Reactions . . . . . . . . . . . . . .334
3.b, 3.f, 5.a, 5.b, 5.c, 7.c, 9.a, 9.e
Chapter 9 Acids and Bases in Solution . . . . . .376
5.e, 7.c, 9.a, 9.b, 9.e
Chapter 10 Chemistry of Living Systems . . . . .418
3.c, 6.a, 6.b, 6.c, 9.c
Unit 4
Earth in Space . ....