1 A Flightless Birds 1
1 B Wildlife Photography 3
2 A Dressing for the Season 5
2 B Protection from the Sun 7
3 A Home Entertainment 9
3 B Home Audio: From Tinfoil to Compact Discs 11
4 A Research on the Internet 13
4 B Writing a Science Research Paper 15
5 A Oceanographers at Work 17
5 B The JASON Project 19
6 A Muscles and Their Functions 21
6 B Training to Be a Runner 23
7 A The Science of Musical Instruments 25
7 B What Determines Perfect Pitch? 27
8 A Energy in Its Many Forms 29
8 B Geothermal Energy: A Renewable Resource 31
9 A How a Tornado Forms 33
9 B Making a Tornado Safety Plan 35
10 A Dinosaur Parents and Their Young 37
10 B Discovering Dinosaur Eggs 39
11 A The Usefulness of Mud 41
11 B Preparing Adobe Bricks 43
12 A The Origin of Seashells 45
12 B Common Shellfish 47
13 A The Roles of Fruits and Seeds 49
13 B Using Plants to Make Natural Dyes 51
14 A Computers Playing Chess and Solving Problems 53
14 B Are Computers Intelligent? 55
15 A The Rocket: A Powerful Engine 57
15 B Ultraviolet Images of Space 59
16 A George Washington Carver 61
16 B The Health Value of Nuts 63
17 A A Monarch Butterfly's Life 65
17 B A Tour of the Butterfly Farm 67
18 A The Importance of a Balanced Diet 69
18 B The Need for Exercise 71
19 A The Importance of Trees 73
19 B The Problem of Deforestation 75
20 A Large Dams: Benefits or Burdens? 77
20 B Sharing Water from the Hoover Dam 79
21 A How Magnets Work 81
21 B A Compass Treasure Hunt 83
22 A Plant Adaptations 85
22 B Challenges Facing Coastal Plants 87
23 A A History of Mountaineering 89
23 B Learning to Rock Climb 91
24 A Earth's Rotation 93
24 B Observing the Sun 95
25 A Animal Communication 97
25 B Can Animals Communicate with People? 99
附录 101
Answer Key 101
Reading Rate 103
Comprehension Score 104
Comprehension Skills Profile 105