table of contents What Are Airplanes 4 How Do Airplanes Work 6 18 The Future of Airplanes Glossary 22 23 To Learn More Index 24 What Are Airplanes Airplanes are machines that fly through the air They are much faster than other ways of traveling 4 Businesses use airplanes to send items to countries around the world People use airplanes to travel quickly 5 
