Page 2 - 新思维科学活动用书6 样章

Contents

Contents

How to use this book 3

1 The human body 4

1.1 The circulatory system 4

1.2 The respiratory system 8
1.3 The reproductive system 12

1.4 Diseases 16

2 Materials: properties and changes 20

2.1 Properties of substances 20

2.2 Thermal and electrical conductors 25

2.3 Reversible changes 30

2.4 Chemical reactions 35

3 Rocks, the rock cycle and soil 39

3.1 Igneous rocks 39

3.2 Sedimentary rocks and fossils 42

3.3 Metamorphic rocks and the rock cycle 45

3.4 Soil 48

4 Food chains and food webs 53

4.1 Food chains, food webs and energy transfers 53

4.2 Harm to food chains and food webs 57

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