《基础科学》

INTRODUCTION1

CHAPTER ONE：THE SCIENTIST AT WORK1

1．What Is Science？1

2．Observation2

3．Instruments3

4．Questions5

5．Experimenting6

6．Finding Answers9

7．Stating a Problem10

8．An Hypothesis12

9．The Answer13

10．Summing Up15

CHAPTER TWO：EXPERIMENTING WITH ELECTRICITY17

1．What Is Electricity？17

2．Using Electricity18

3．The Dry Cell19

4．Sockets and Wires20

5．Lighting a Bulb22

6．A Complete Circuit and a Switch24

7．Conductors and Nonconductors26

8．A Short Circuit28

9．A Fuse30

10．Heat and Electricity32

11．The Electric-Light Bulb33

12．Wiring the Circuits35

13．Batteries and Ways to Obtain Electricity37

14．Adding Volts38

15．Electricity in Review40

CHAPTER THREE：USING MACHINES41

1．A Machine41

2．The Lever42

3．Kinds of Levers44

4．A Lever for Experimenting46

5．Pulleys48

6．Wheel and Axle50

7．The Inclined Plane53

8．The Screw55

9．The Wedge57

10．The Power Shovel58

11．Elevators60

CHAPTER FOUR：WORKING WITH CHEMICALS63

1．Molecules and Atoms ＆ Elements and Com-pounds63

2．Matter and Change66

3．Describing Chemical Changes69

4．“Breaking”a Compound ＆ Making a Com-pound73

5．Some Important Chemical Changes76

6．Chemicals Every Day78

CHAPTER FIVE：INTO SPACE WITH SATELLITES79

1．Launching Satellites79

2．Rocket Power81

3．Satellite Rockets82

4．Satellites—Up and Down84

5．Satellite Instruments86

词汇表89