致学生
致老师
1 A The History of printing
1 A The book and electronic publishing
2 B The weathering and erosion of rock
2 B Weather forecasting through the ages
3 A Space. time,and gravitation
3 B Albert einstein
4 A Power and leadership in the wolf pack
4 B The mysterious nature of wolves
5 A Producers and consumers:the food chain
5 B Natures pesticides
6 A What is stress?
6 B Sterss management
7 A Air and water pollution
7 B Rachel carson,scientist and writer
8 A The scientific method
8 B Scientific observatons and photography
9 A The sounds of music
9 Bmusic across cultures
10 A Technology and the history of communications
10 B Cryptography and cryptology:figure it out
11 A Fall foliage
11 B Stained glass:the creation of color
12 A Fall foliage
12 B The autumnal equinox
13 A The life cycle of the barnacle
13 B Watch out for some marine life
14 A Digging up our past:archaeology
14 B The controversy over herbal medicines
15 A Hippocrates and the symptoms of disease
15 B The controversy over herbal medicines
16 A The respiratory system
16 B Taking care of the lungs
17 A Life in antarctica
17 B lcebergs of the arctic ocean
18 A Bats
18 B Bats and the carlsbad caverns national park
19 A Rain forests
19 B Saving the rain forest
20 A The human genome project
20 B Ethics and the human genome project
21 A What is physics?
21 B The physics of tennis
22 A The development of multimedia
22 B Virtually real
23 A Condensation and evaporation
23 B An experiment:distilling water
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附录
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