TABLE OF CONTENTS CHAPTER 1 Light Up the Dark 4 CHAPTER 2 How They Work 8 CHAPTER 3 All Kinds of Bulbs 14 ACTIVITIES TOOLS Try This 22 Glossary 23 Index 24 To Learn More 24
CHAPTER 1 LIGHT UP THE DARK You wake up thirsty It is dark You flip the light switch Now you can safely walk to the kitchen light switch
We use light bulbs every day to help us see They are in lamps flashlights and cars They are in appliances such as microwaves and ovens They also light up streets and parks
