TABLE OF CONTENTS CHAPTER 1 Drifters 5 CHAPTER 2 Lungs of the Earth 11 THAT’S AMAZING Glowing Plankton 16 CHAPTER 3 Learning About Plankton 19 CHAPTER 4 Protecting Plankton 25 Focus on Plankton 30 Glossary 31 To Learn More 32 Index 32
DRIFTERS In a single spoonful of ocean water an entire world exists Plankton are tiny organisms They drift in oceans rivers and lakes Humans can rarely see them Still plankton play a huge role on Earth For example much of the air that humans breathe depends on plankton So do many of the foods that humans eat Plankton can be seen up close under a microscope 5 CHAPTER 1
