Did you know? Science

Contents......Page 7
6–7 What is science?......Page 8
The living world......Page 11
10–11 What do living things need to survive?......Page 12
12–13 What is an animal?......Page 14
14–15 How big are bacteria?......Page 16
16–17 How do plants grow?......Page 18
18–19 What makes things sticky?......Page 20
20–21 Are spiders insects?......Page 22
22–23 What are feathers for?......Page 24
24–25 Which animals have fur?......Page 26
26–27 What do lions eat?......Page 28
28–29 How do butterflies grow?......Page 30
30–31 Why don’t polar bears freeze?......Page 32
32–33 How do we know dinosaurs existed?......Page 34
Human body......Page 36
36–37 What is my body made of?......Page 38
38–39 How big is my skin?......Page 40
40–41 What do bones do?......Page 42
42–43 How do people move?......Page 44
44–45 How do I breathe?......Page 46
46–47 What makes my blood move?......Page 48
48–49 Where does my food go?......Page 50
50–51 What controls my body?......Page 52
52–53 How do cuts heal?......Page 54
54–55 How does my body fight sickness?......Page 56
The material world......Page 58
58–59 What is everything made of?......Page 60
60–61 Why does chocolate melt?......Page 62
62–63 How can I get salt out of saltwater?......Page 64
64–65 What is a metal?......Page 66
66–67 How is plastic made?......Page 68
68–69 What makes fireworks explode?......Page 70
70–71 Why is lemon juice sour?......Page 72
Energy......Page 74
74–75 Where does energy go?......Page 76
76–77 How do we see colors?......Page 78
78–79 How does sound move?......Page 80
80–81 How does heat move?......Page 82
82–83 What is electricity?......Page 84
84–85 How do lights turn on?......Page 86
86–87 How can I make my hair stand on end?......Page 88
88–89 Can you make electricity from a magnet?......Page 90
90–91 Where does coal come from?......Page 92
Forces and movement......Page 94
94–95 What makes things speed up or slow down?......Page 96
96–97 What stops things from slipping?......Page 98
98–99 How do magnets pull?......Page 100
100–101 How can I move something more easily?......Page 102
102–103 What makes cars go?......Page 104
104–105 What stops us from floating away?......Page 106
106–107 How do planes stay in the air?......Page 108
Our planet......Page 110
110–111 How deep can a hole get?......Page 112
112–113 Why does the ground shake?......Page 114
114–115 Where does rain come from?......Page 116
116–117 Why is planet Earth blue?......Page 118
118–119 Where does wind come from?......Page 120
120–121 What’s inside a hurricane?......Page 122
122–123 Where does planet Earth end?......Page 124
124–125 Where does the moon go?......Page 126
126–127 Can we live on other planets?......Page 128
128–129 What is space made from?......Page 130
130–131 How do people travel into space?......Page 132
132–133 Answers......Page 134
134–137 Quiz your friends!......Page 136
138–139 Glossary......Page 140
140–143 Index......Page 142
144 Acknowledgments......Page 146