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Cambridge Primary Science Learner's Book 6

Cambridge Primary Science Learner's Book 6

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Humans and animals 6
 
1.1 Body organs 6
 
1.2 The heart 8
 
1.3 Heartbeat and pulse 10
 
1.4 The lungs and breathing 12
 
1.5 The digestive system 14
 
1.6 What do the kidneys do? 16
 
1.7 What does the brain do? 18
 
Check your progress 20
 
2 Living things in the environment 22
 
2.1 Food chains in a local habitat 22
 
2.2 Food chains begin with plants 24
 
2.3 Consumers in food chains 26
 
2.4 Food chains in different habitats 28
 
2.5 Deforestation 30
 
2.6 Air pollution 32
 
2.7 Acid rain 34
 
2.8 Recycling 36
 
2.9 Take care of your environment 38
 
Check your progress 40
 
3 Material changes 42
 
3.1 Reversible and irreversible changes 42
 
3.2 Mixing and separating solids 44
 
3.3 Soluble and insoluble substances 46
 
3.4 Separating insoluble substances 48
 
3.5 Solutions 50
 
3.6 How can we make solids dissolve faster? 52
 
3.7 How does grain size affect dissolving? 54
 
Check your progress 56
4 Forces and motion 58
 
4.1 Mass and weight 58
 
4.2 How forces act 60
 
4.3 Balanced and unbalanced forces 62
 
4.4 The effects of forces 64
 
4.5 Forces and energy 66
 
4.6 Friction 68
 
4.7 Investigating friction 70
 
4.8 Air resistance and drag 72
 
Check your progress 74
 
5 Electrical conductors and insulators 76
 
5.1 Which materials conduct electricity? 76
 
5.2 Does water conduct electricity? 78
 
5.3 Do different metals conduct electricity
 
equally well? 80
 
5.4 Choosing the right materials for
 
electrical appliances 82
 
5.5 Circuit symbols 84
 
5.6 Changing the number of components 86
 
5.7 Adding different components 88
 
5.8 Length and thickness of wire in a circuit 90
 
5.9 How scientists invented batteries 92
 
Check your progress 94
 
Reference 96
 
Glossary and index 106
 
Acknowledgements 112
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