1 A Eating for Good Health 1
1 B Nutritional Facts and Myths 3
2 A Sea Mammals 5
2 B A Powerful Killer 7
3 A What Is a Mineral? 9
3 B Moh's Scale of Mineral Hardness 11
4 A Global Warming 13
4 B Mario J.Molina and the Banning of CFCs 15
5 A The Renaissance:A Rebirth of Learning 17
5 B Leonardo da Vinci 19
6 A What Is a Geneticist? 21
6 B Rosalind Franklin and the Structure of DNA 23
7 A The Beauty of Orchids 25
7 B How to Grow Orchids from Seed 27
8 A The Science of Golf 29
8 B The Evolution of the Golf Ball 31
9 A Animal Classification:Vertebrates and Invertebrates 33
9 B Cephalopods 35
10 A The Life Cycle of a Star 37
10 B The Andromeda Galaxy 39
11 A Earth's Changing Landscape 41
11 B Trees:Anchors of Earth's Crust 43
12 A How to Avoid Avalanches 45
12 B Surviving an Avalanche 47
13 A The Three Phases of Matter 49
13 B How Does Temperature Influence Matter? 51
14 A The Beneficial Garter Snake 53
14 B Snakebites and Antivenin 55
15 A Avoiding a Water Crisis 57
15 B Keeping Drinking Water Clean and Safe 59
16 A The World of Dinosaurs 61
16 B Paleontologist:Fossil Detective 63
17 A Poisonous Plants 65
17 B Poisonous Mushrooms 67
18 A The Electromagnetic Spectrum 69
18 B Do Animals See Color? 71
19 A Isaac Newton's Three Laws of Motion 73
19 B Laws of Motion at an Amusement Park 75
20 A Using Technology to Predict Weather 77
20 B Preparing for Hurricanes 79
21 A Endangered Species 81
21 B Mountain Gorillas 83
22 A Radioactivity 85
22 B Dr.Chien-Shiung Wu and the Law of Parity 87
23 A Animals with Links to the Past 89
23 B Determining the Age of a Fossil 91
24 A The Remarkable Brain 93
24 B How Does Memory Work? 95
25 A Measuring Air Pressure with Barometers 97
25 B Making a Barometer 99
附录 101
Answer Key 101
Reading Rate 103
Comprehension Score 104
Comprehension Skills Profile 105