DK - Did You Know, Earth

Contents......Page 4
Our planet......Page 7
How did the Earth form?......Page 8
How does the atmosphere keep us safe?......Page 10
Where does the sun go at night?......Page 12
How is the Earth like an onion?......Page 14
Why don’t things float off the Earth?......Page 16
Why can’t we live on Mars?......Page 18
Did the chicken or egg come first?......Page 20
Does land stay still?......Page 22
Did everywhere freeze in thelast ice age?......Page 24
The Earth’s surface......Page 27
Do mountains grow?......Page 28
Are volcanic flows slow or fast?......Page 30
What happens when water gets superheated?......Page 32
Is soil made of animals?......Page 34
Do I contain minerals?......Page 36
Which rock should I build with?......Page 38
Can a cliff turn into sand?......Page 40
Why do rocks form amazing shapes?......Page 42
Could I become a fossil?......Page 44
Can you freeze in a desert?......Page 46
How does a sinkhole sink?......Page 48
How do raindrops make a cave?......Page 50
Do earthquakes hit the same places?......Page 52
Do islands float?......Page 54
How is a cactus like a camel?......Page 56
Do swamp monsters exist?......Page 58
Is there life on moss?......Page 60
Blue planet......Page 63
Why do things get carried out to sea?......Page 64
Which waves can you surf?......Page 66
Can we drink seawater?......Page 68
Why does the Earth need the moon?......Page 70
Where do rivers start?......Page 72
Can a lake be bigger than a sea?......Page 74
Where is the biggest waterfall?......Page 76
How big are icebergs?......Page 78
How is a glacier like a cheese grater?......Page 80
What’s at the bottom of the ocean?......Page 82
Where is the ocean’s twilight zone?......Page 84
Up in the air......Page 87
Is there air in space?......Page 88
Why are there colors in the sky?......Page 90
Why do we have seasons?......Page 92
Why are places hot or cold?......Page 94
Why does water fall from the sky?......Page 96
Is that a dinosaur in the clouds?......Page 98
Does lightning always strike the tallest spot?......Page 100
Can humans make it rain?......Page 102
How does a tornado form?......Page 104
Living on the Earth......Page 107
How many people live on the Earth?......Page 108
How do countries begin?......Page 110
How have we changed the Earth?......Page 112
What is a city?......Page 114
How do we feed everyone?......Page 116
How do we find our way around?......Page 118
How much plastic is in the ocean?......Page 120
What is recycling?......Page 122
How bad is a drought?......Page 124
Is the Earth getting warmer?......Page 126
How do trees help humans?......Page 128
What is the future of energy?......Page 130
Answers......Page 132
Quiz your friends!......Page 134
Glossary......Page 138
Index......Page 140
Acknowledgments......Page 144