| A | B |
|---|
| invention | something that has been made for the first time |
| Elisha Otis | invented brakes for elevators |
| Henry Bessemer | invented a way to turn iron into steel |
| Andrew Carnegie | produced great amounts of steel |
| Thomas Edison | invented the light bulb |
| William LeBaron Jenney | built the first skyscraper |
| steel | the invention that made skyscrapers possible |
| Jane Addams | Opened Hull House |
| Louis Pasteur | Discovered that germs cause infections |
| pasteurization | using heat to kill germs |
| Charles Drew | found a way to perserve blood |
| Alexander Graham Bell | He started a school for deaf people. |
| Jonas Salk | Developed a vaccine for polio |
| Firefighters | keep our community safer |
| compare | how things are alike |
| contrast | how things are different |
| skyscraper | a very tall building |
| vaccine | prevents diseases like polio, measles, mumps, etc. |
| 1871 | The Great Fire of Chicago happened |
| Chicago | "home of the skyscraper" |
