地球科学 初级版PDF电子书下载

TO THE STUDENT 2

THE SOLAR SYSTEM 3

Introduction 5

Unit 1 What's Your Space Address? 6

Unit 2 The Planet We Live On 11

Unit 3 Our Moon 18

Unit 4 Our Sun 27

Unit 5 Our Solar System 33

Unit 6 Exploring Our Solar System 40

Show What You Learned 48

CHANGING EARTH 49

Introduction 51

Unit 1 The Land Around You 52

Unit 2 Inside Moves 57

Unit 3 Mountains 65

Unit 4 Wearing Down Mountains 71

Unit 5 Climate 81

Unit 6 People Change the Earth 87

Unit 7 The Land You Live On 92

Show What You Learned 94

WEATHER 95

Introduction 97

Unit 1 Hot or Cold? 98

Unit 2 How Windy Is It? 103

Unit 3 Heavy Air 113

Unit 4 Water in the Air 120

Unit 5 Water from the Sky 128

Unit 6 What Will the Weather Be Like? 137

Show What You Learned 140

EARTH RESOURCES 141

Introduction 143

Unit 1 Air 144

Unit 2 Water 151

Unit 3 Living Off the Land 159

Unit 4 Fossil Fuels 167

Unit 5 Minerals 175

Unit 6 Save Your Resources! 182

Show What You Learned 186

GLOSSARY 187