《光电热奇观》

LIGHT1

Introduction3

How Light travels3

How light behaves6

Shadows8

Colours of light10

Making colours white14

Reflection of light16

Uses of mirrors19

Parts of the eye22

The eyes22

How the eyes work25

Making pictures with a lens29

A water drop microscope31

A pin-hole camera34

光37

光是怎样传播的39

导言39

光的特性40

影子41

光的色彩42

使色彩呈白色43

光的反射44

镜子的应用45

眼睛46

眼睛的组成部分47

眼睛是如何工作的48

用透镜成像49

水滴显微镜50

针眼照像机51

ELECTRICITY53

Introduction55

What is electricity?55

How electricity travels57

Conductors and insulators60

off64

How to turn electricity on and64

How to light two bulbs in a circuit69

Batteries and ways to obtain electricity71

Electricity can give us heat76

Electricity can give us light78

Electricity can give us magnetism80

Electricity is a form of energy82

Be careful of electricity83

Measurement of electricity84

电87

电是什么？89

导言89

电是怎样传导的90

导体和绝缘体90

怎样开闭电流92

怎样在一个电路中点亮两盏灯泡94

电池以及获取电流的方法94

电可以为我们供热96

电可以给我们以光明97

电是能量的一种形式98

电可以为我们供磁98

当心触电99

电的度量99

HEAT101

Introduction103

Our bodies contain heat103

What gives heat?104

How do we measure heat?106

Expansion and contraction112

Heat makes liquids expand114

Heat makes things expand114

Heat makes gases expand116

Heat makes solids expand117

Heat makes gases move upwards119

Heat makes liquids move upwards121

Conduction123

Heat travels from one place to another123

Convection128

Radiation131

Heat makes things change133

Heat and burning136

热139

热是由什么提供的？141

导言141

我们如何测定热量？142

我们的身体含有热量143

膨胀与收缩144

热使液体膨胀145

热使物体膨胀145

热使固体膨胀146

热使气体膨胀146

热使气体向上运动147

热使液体向上运动148

热从一个地方向另一个地方传递149

传导149

对流151

辐射152

热使物质发生变化153

热与燃烧154