| A | B |
|---|
| skyscrapers | very tall buildings |
| invention | something that has been made for the first time |
| elevator | moves people up and down in a building |
| Elisha Otis | made elevators safe for people |
| Steel | Made skyscrapers possible |
| Firefighter | Whose daily job keeps your community safer? |
| pasteurization | Using heat to kill the germs |
| preserve | save something to be used later |
| vaccine | a liquid made from the dead or weakened germs of a disease. |
| Charles Drew | Which person studied how to preserve blood? |
| Hull House | How did Jane Addams help Chicago? |
