潮池探奇PDF电子书下载

Sharks 6

Reading Objectives 6

The World of Sharks 7

Perfect Predators 10

Sharks and people 16

Who Is Stronger? 20

Exploring Tide poolsReading Objectives 22

What Is a Tide Pool? 23

Animals in a Tide Pool 25

Plants in a Tide Pool 30

Survival in a Tide Pool 36

How to Explore a Tide Pool 40

Better Off Wet 42

Reading Objectives 42

Welcome to Wetlands 43

Bogs 46

Swamps 50

Marshes 54

Better Off Wet 58

Animal Hiding PlacesReading Objectives 62

Why Animals Hide 63

Where Animals Hide 64

Sharing Hiding Places 70

Hiding in Groups 72

Hiding to Catch Food 74

Hiding to Survive the Weather 76

Hiding to Protect the Young 79

Review ActivitiesThink and Discuss 82

Multiple-Choice Test 84

Index 88