《英语课外读物 上》求取 ⇩

PART Ⅰ1

The Sun Has a Family1

The Sun Is Made of Gases2

The Sun Is aStar3

The Sun Is Important to the Earth5

How the Moon Seems to Change Its Shape6

Why Do We Have Seasons?8

What Makes Day and Night?9

Air Aruund Us12

Why Does the Wind Blow?13

Lightning14

Clouds16

Dew and Frost19

The Story of a Raindrop21

Can People Really Make Rain?24

Rainbows26

What Will the Weather Be?29

Weather Forecasts32

PARTⅡ35

Energy35

2．Some Science Experiments40

3．Making Water Flow Up42

4．Sound44

5．Sounds Are Caused by Vibration45

6．How Fast Does Sound Travel?47

7．Why a Compass Needle Points North and South50

8．How You Can Make an Electric Magnet52

9．VIBGYOR57

10．Anaglyph59

11．Colour61

12．How Can We Make Light Turn a Corner ?64

13．Why Some People Wear Spectacles67

14．Why Can a Gas Balloon Sail Off into the Air?70

15．What IsGravity?71

16．What Does Weight Mean?72

17．What Does GravityDo to Falling Things?74

18．When Does Gravity MakeWork Hard for Us?76

19．How Does Gravity Help You to Move on a Swing ?78

20．Does Gravity Pull in Space ?80

21．Rocket and Satellites82

22．Rocket in Stages85

23．Space86

PARTⅢ90

1．Dividing a Line Segment into Two Equal Parts90

2．The Ladder of Numbers111

8．How111

of North?111

9．Ways of Telling Time111

10．What Is a Digital Computer?111

11．What Is the Binary Number System?111

12．Speed of Earth in Space111

13．Speed of an Earth Satellite115

14．The Approximate Weight of the Air on Earth117

PARTⅣ122

1．Why Does Water Put Out Fire?122

2．Why Does Petrol Burn but Water Does Not?123

3．Some Experiments with Moving Molecules125

4．Why Do You Wear Light-Coloured Clothing in Summer?129

5．What Makes Iron Get Rusty?131

6．Solids,Liquids,Gases132

7．Why Solids,Liquids and Gases Are So Different134

8．Water137

？astic?159

？-Made Wonder Cloth161

19．Building with Glass164

20．The Smallest Thing ThereIs167

PARTⅤ174

1．Five Puzzles174

2．How Do Plants Grow?178

3．Why Doesn't Wheat Freeze under Snow?180

4．Why Don't the Fish Freeze When Ponds Freeze Over?182

5．Why Do Tree Rings TellYou the Age of a Tree?184

6．Seeds Travel186

7．Animals in the Desert188

8．Cactus,a Desert Plant190

9．Cold-Blooded Animals and Warm-Blooded Animals192

10．Cells195

11．Green Plants198

12．The Bee200

13．The Ant203

14．The Spider206

15．When the World Was Young209

16．How Are Animals Classified?213

17．Mammals216

18．Birds219

19．Reptiles222

20．Amphibians224

21．Fish226

22．Insects228

23．How Are Plants Classified231

24．Plants That Make Seeds233

25．Plants That Do Not Make Seeds238

26．More and Better Plants240

PARTⅥ248

1．Why Is the Ocean alty?248

2．Water and Rock250

3．Ice and Rock253

4．Plants and Rocks255

5．Does the MoonHave Gravity?257

6．Tides259

7．Using the Tide260

8．How Coal Was'Formed261

9．How Oil Was Formed263

10．Oceans264

11．Rocks and Minerals267

12．What Is a Rock?269

13．What Is a Mineral?271

14．What Is a Fossil?274

15．A Rock Book277

16．What Is the Earth Like Inside?281

17．Volcanoes283

18．Earthquakes285

19．Limestone Caves288

附：总词汇表293