Fascinating Facts • An inventor working on radar got the idea for the microwave oven after radio waves melted a chocolate bar in his pocket • The modern zipper, invented in 1912, was named for the sound it made when it was used to close rubber boots • Clarence Birdseye, who invented a way to freeze food for sale, got the idea from watching the Inuits in Canada Genre Nonfiction Comprehension Skill Summarize Text Features • Time Line • Captions Scott Foresman Social Studies ISBN 0-328-14850-4 ì