致学生
致老师
1 A Changing Views of the Planets
1 B The Rings of Saturn
2 A Minerals and the Three Categorier of Rock
2 B Rock Collecting
3 A The Ecosystem of a Pond
3 B An Ecosystem in a Barrel
4 A The lmportance of Photosyntyesis
4 B Experiment:Finding Starch in Plant Leaves
5 A Stormy Weather
5 B What Is the Eye of a Hurricane?
6 A Simple and Compound Machines
6 B Human-Powered Flying Machines
7 A Human Diseases
7 B Allergens
8 A The Beliefs of Aristotle
8 B Nicolaus Copernicus and His Heliocentric Model
9 A Blood and the Circulatory System
9 B Sickle-Cell Anemia
10 A Kinetic and potential energy
10 B Sports and potential energy
11 A Antibiotics
11 B Super-Resistant bacteria
12 A How substances move through plants
12 B plant pigments
13 A Aquatic biomes
13 B An lmportant conservationist
14 A Robots and humans:an uneasy partnership
14 B Using robots in surgery
15 A Kinds of dinosaurs
15 B Reconstructing dinosaurs movements
16 A Chemistry in everyday life
16 B Organic farming
17 A Mayan astronomy
17 B Calendars across the ages
18 A The early development of meteorology
18 B Weather proverbs
19 A The biochemist
19 B The growing role of genetics in biochemistry
20 A The science of bike riding
20 B Wheels and roads
21 A Smell and taste
21 B Balance and dizziness
22. A Single-celled organisms
22 B Types of monerans
23 A Wireless communication
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