| 致学生 致老师 1 A The Oceans 1 B Tide Pools 2 A Computer Games in Education 2 B How to Be a Game Programmer 3 A The Rock Cycle 3 B The Natural Wonders of Bryce Canyon 4 A What Is Hail? 4 B The Sky Is Falling! 5 A Food Chains 5 B Fungus Farmers 6 A The Work of an Archaeologist 6 B The Process of an Archaeological Dig 7 A Electromagnets 7 B Electricitys Journey 8 A Water Properties 8 B Mangrove Trees Survive the Salt 9 A The History of Printing 9 B Hieroglyphs Uncovered 10 A The Scientific Process 10 B Exploring the World 11 A How Animals Cope 11 B Its a Skunks Life 12 A How the Heart Works 12 B Why Work Out? 13 A Types of Volcanoes 13 B Mount Rainier 14 A The Prairie Ecosystem 14 B Prairie Dog Towns 15 A Transportation Innovations 15 B Incredible Inventors 16 A The Mighty Insect 16 B The Dragonfly： Ancient One 17 A Mountains 17 B Trailblazing Volunteers 18 A The Life of a Tree 18 B Tree Rings： Diary of a Life 19 A What Causes Lightning? 19 B Lightning Safety 20 A Space Mysteries 20 B Mars， Anyone? 21 A The History of Vaccinations 21 B What You Should Know About Rabies 22 A Energy from the Sun 22 B A Solar Eclipse 23 A Fire and the Forest Ecosystem 23 B Kirtlands Warbler 24 A The History of Lights 24 B You Can Help Conserve Electricity 25 A What Is the Wind? 25 B Making a Wind Vane 附录 Answer Key Reading Rate Comprehension Score Comprehension Skills Profile |
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