| A | B |
|---|
| biologist | person who studies how people, other animals, |
| laboratories | places where science studies and experiments |
| migrating | moving from one place to another, usually when |
| observation | watching and looking, being careful to notice |
| skyscraper | very tall building found in the city |
| urban | having to do with a city or city life |
| habitat | the natural surroundings of a plant or animal |
| pollution | harmful or dirty material added to the air, water, or soil |
| exhaust | gases and smoke from cars that go into the air |
| survive | to remain alive |
