CONTENTS 1
1．Light and Shadow 1
2．Do You Like Insects? 4
3．Are Sounds Useful or Harmful? 7
4．Sweet Dreams 11
5．The Spider 15
6．Catnap 18
7．What Does Man Do with His Big Brain? 22
8．Right or Left? 25
9．How Women Changed History 28
10．Coal 31
11．Acupuncture 34
12．Water,Steam and Ice 38
13．A Beautiful World 41
14．The Sun 44
15．The Sea 47
16．The Movement of the Earth 51
17．Robot 55
18．Space Exploration 58
19．Nobel Prize 62
20．Oil in the Earth 66
21．Population and Pollution 69
22．Heredity 73
23．Dislexia 76
24．The Tree of Life 80
25．Life Expectancy 83
26．Temperature 86
27．Change of State of Matter 89
28．Animal Homes 92
29．Animal Mimics 95
30．The Butterfly 99
31．Computers 102
32．Shivering 106
33．Bath and Bathing 109
34．The Whale 113
35．The Shark 117
36．What Is Colour? 121
37．Warm and Cool Colours 125
38．Air 128
39．A Look at the Future 132
40．The Houses of the Future 136
41．The Eye and the Camera 140
42．Vitamins 144
43．Meteor-psychology 148
44．Development and Evolution 152
45．The History of Roads 156
46．Food 160
47．Shelter for Man 164
48．Clothing 169
49．Sleep and Dream 174
50．Problem and Solution 178
51．Food Industry 182
52．Is There Life on Other Planets? 186
53．What Makes the Weather? 190
54．Weather Forecasting 195
55．How Well Do You See? 200
56．A Source of Energy 205
57．Heat Transfer 210
58．Mean and Median 215
59．Louis Braille 220
60．Energy Transitions 225
Science Riddles 230
Answer Key to Comprehension Exercises 235
Vocabulary 242