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Earth's Resources 2

Before You Read 2

Earth's Resources 6

Section 1:Renewable Resources 8

Section 2:Nonrenewable Resources 12

Section 3:The Problem with Energy Production 18

genre Reading an Encyclopedia Entry Geothermal Energy 22

Section 4:Energy Conservation 24

After You Read 28

Glossary 30

Understanding Natural Resources 32

Before You Read 32

Understanding Natural Resources 36

Section 1:Natural Resources around Us 37

Section 2:Energy and How We Use It 41

genre Reading an Encyclopedia Entry Pollution 50

Section 3:Conserving Energy 55

After You Read 58

Glossary 60

Using Natural Resources 62

Before You Read 62

Using Natural Resources 64

Section 1:Our Precious Natural Resources 65

Section 2:Nonrenewable Resources Produce Energy 71

genre Reading an Encyclopedia Entry Mining 74

Section 3:Renewable Resources Produce Energy 78

After You Read 88

Glossary 90

Heating Up 92

Before You Read 92

Heating Up 96

Section 1:Energy in Motion 98

Section 2:Heat Makes Molecules Move 102

Section 3:What is Heat? 106

Section 4:How Heat Transfers 108

genre Using a Web Site Ultrauiolet Radiation 114

After You Read 118

Glossary 120

Heat Around Us 122

Before You Read 122

Heat Around Us 126

Section 1:Heat Energy 127

Section 2:Temperature Measures Motion 134

genre Using a Web Site Temperature Scales:Fahrenheit and Celsius 136

Section 3:The Give and Take of Heat Transfer 138

After You Read 148

Glossary 150

Understanding Heat 152

Before You Read 152

Understanding Heat 154

Section 1:Heat Around Us 155

Section 2:Heat and Molecule Movement 160

Section 3:Heat Transfer 164

Section 4:Heat and Chemical Reactions 172

genre Using a Web Site Exploring Chemical Reactions 174

After You Read 178

Glossary 180