To the Teacher 3
Steps for the Reader 4
Vocabulary Words and Definitions 6
Concept Ⅰ:Changes Grow Out of Needs 13
The Day the Native People Cried 14
Nine Years from Home 16
Two Tribes 18
The Fussy Bees 20
Some Very Wet Farms 22
Life from the Sea 24
Bring on the Rain 26
The Magic Sticks 28
Nation of Villages 30
Beavers by Parachute 32
Mountainside Farming 34
The Bug War 36
The Town That Saved Its Water 38
Looking for"Black Gold" 40
Clinton's Ditch 42
A Brave Fighter 44
Bricks of Sod 46
The City That Grew in a Lake 48
The King Would Not Listen 50
The Salt March 52
The Day King John Could Not Forget 54
Spin-offs All Around You 56
The Engine for Space 58
"Bea's Diner"in Space 60
The Man Who Saved the Moon 62
Concept Ⅱ:Environment Affects All Living Things 65
A Virus Among Us 66
A Refrigerator in the Ground 68
The Strangers 70
Not Made for Swimming 72
The Animal That Keeps to Itself 74
Traveler's Friend 76
Digging to Learn 78
Life from the Past 80
Call a Geologist 82
Feet Like Snowshoes 84
The Land of Dripping Water 86
Everglades or Neverglades! 88
The Machine That Hatches Eggs 90
When the Rains Didn't Come 92
A Day in May 94
Halfway Country 96
Have an Apple! 98
More than a Million Cows 100
A Way to Remember 102
History on Strings 104
The Writing on Leaves 106
Only 26 Million Miles Away 108
The Mysteries of Mars 110
Work Clothes for Space 112
The Wise Father 114
Concept Ⅲ:People Use the Resources at hand 117
Prizes for Maria 118
The Holy Grounds 120
From the Head of a Whale 122
Food for Tomorrow 124
New Uses for Old Plants 126
Two Plants in One 128
What's in a Rock? 130
Mirrors from Volcanoes 132
Growing Rocks from Seeds 134
Fences That Bloom 136
Fish That Climb Ladders 138
The Brown Snow 140
Plant from the Sea 142
Who Has the Salt? 144
Using Space in Japan 146
Beehive Houses 148
Houses on Stilts 150
Houses that Breezes Blow Through 152
The Daring People 154
The Passing of the Old Ships 156
A Ship Called the Flyboat 158
Building on Ideas 160
More Than Nothing 162
New Designs for Space 164
The Wonderful Hammer 166
Charts for Record Keeping 170