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Sound and Light 12

Nature of Science:Sonic Booms 12

Chapter 1 Characteristics of Waves 16

1 What Are Waves? 18

2 Properties of Waves 22

3 Interactions of Waves 28

4 Integrating Earth Science:Seismic Waves 36

Chapter 2 Sound 42

1 The Nature of Sound 44

2 Properties of Sound 50

3 Combining Sound Waves 56

4 Integrating Life Science:How You Hear Sound 66

5 Applications of Sound 70

Chapter 3 The Electromagnetic Spectrum 78

1 The Nature of Electromagnetic Waves 80

2 Waves of the Electromagnetic Spectrum 84

3 Producing Visible Light 94

4 Integrating Technology:Wireless Communication 100

Chapter 4 Light 114

1 Reflection and Mirrors 116

2 Refraction and Lenses 121

3 Color 127

4 Integrating Life Science:Seeing Light 133

5 Using Light 137

Interdisciplinary Exploration:The Magic of the Movies 150

Reference Section 156

Skills Handbook 156

Think Like a Scientist 156

Making Measurements 158

Conducting a Scientific Investigation 160

Thinking Critically 162

Organizing Information 164

Creating Data Tables and Graphs 166

Appendix A:Laboratory Safety 169

Glossary 172

Index 176

Acknowledgments 179

Inquiry Activities 17

CHAPTER PROJECT 17

Opportunities for long-term inquiry 17

Chapter 1:Over and Over and Over Again 17

Chapter 2:Music to Your Ears 43

Chapter 3:You're on the Air 79

Chapter 4:What a Sight! 115

DISCOVER 18

Exploration and inquiry before reading 18

How Do Waves Travel? 18

How Can Yon Change a Wave? 22

How Does a Ball Bounce? 28

Can You Find the Sand? 36

What Is Sound? 44

How Does Amplitude Affect Loudness? 50

How Can You Produce Patterns of Sound? 56

Where Is the Sound Coming From? 66

How Can You Use Time to Measure Distance? 70

How Does a Beam of Light Travel? 80

What Is White Light? 84

How Do Light Bulbs Differ? 94

How Can Radio Waves Change? 100

How Does Your Reflection Wink? 116

How Can You Make an Image Appear on a Sheet of Paper? 121

How Do Colors Mix? 127

Can You See Everything With One Eye? 133

How Does a Pinhole Viewer Work? 137

Sharpen your Skills 29

Practice of specific science inquiry skillsObserving 29

Graphing 47

Designing Experiments 71

Observing 95

Classifying 118

Developing Hypotheses 129

TRY Tuis 31

Reinforcement of key concepts 31

Standing Waves 31

The Short Straw 52

Pipe Sounds 54

Plucking Rubber Bands 58

Listen to Sounds 67

How Do Light Beams Behave? 82

What Does a Bee See? 91

Produce Electromagnetic Interference 102

Disappearing Glass 122

True Colors 135

What a View! 138

Skills Lab 24

In-depth practice of inquiry skills 24

Wavy Motions 24

Making Waves 34

The Speed of Sound 49

Looking at Images 126

Real-World Lab 64

Everyday application of science concepts 64

Musical Notes 64

Comparing Light Bulbs 98

Build a Crystal Radio 108

Changing Colors 132

Interdisciplinary Activities 104

Science and History 104

Wireless Communication 104

Optical Instruments 142

Science and Society 69

Noise Pollution 69

Irradiated Food 93

Connection 26

Math Toolbox 26

Music 59

Social Studies 85

Visual Arts 130