Unit 1 Physics 1
A．Newton's Second LaW 1
B．Radioactivity and Nuclear Physics 5
C．The Atom and Its Nucleus 11
D．Solids,Liquids and Gases 13
E．Laser 15
F．Speed Barrier of Planes 18
Unit 2 Electronics and Bionics 20
A．Electrical Eyes and Hands 20
B．Wireless-set 29
C．Bionic Men 33
D．Electric Fishes 36
E．Plant Scanning 38
F．Artificial Intelligence 39
Unit 3 Biology 42
A．The Evolution of Life on the Earth 42
B．Animal and Music 46
C．Insects Eating 49
D．Animal Communication 53
E．Island Biogeography 55
F．An Explosive End ofDinosaurs 56
G．Mosquito 58
H．Saving Whales 61
Unit 4 Astronomy and Geology 64
A．Black Hole 64
B．Global Warming and Climate Change 67
C．The Yellow River 71
D．Aurora 76
E．Volcano 78
F．Age ofthe Earth 80
G．Sunbeams 82
H．Antarctica 85
I．Erosion of Rocks 88
J．Evidence for Atlantis 90
K．Rainbows 92
L．The Origin of Rivers 94
M．Our Solar System 97
N．Earthquake 99
Unit 5 Chemistry 102
A．Artificial Fertilizers 102
B．Organic Chemistry 106
C．Petroleum 109
D．Chemistry Molecules 111
E．Pesticide 115
Unit 6 Medicine 117
A．First Aid and Home Safety 117
B．Inflammation and Fever 139
C．Neurasthenia 143
D．The Science ofGenetics 145
E．Vitamin 148
Unit 7 Physiology and Psychology 152
A．The Placebo Effect 152
B．Your Memory at Work 155
C．Human Sleep 157
D．Food and Thought 159
E．Why We Laugh 162
F．Tears 164
G．Sense ofCold 167
H．Bones 168
I．Fatigue 170
References 172