| A | B |
|---|
| drought | a long period of dry weather |
| endangered organism | a kind of living thing of which very few exist and that someday might not be found on earth |
| extinct organism | a kind of living thing that is no longer found on earth |
| fossil | the hardened parts or marks left by an animal or plant that lived long ago |
| pollution | anything harmful added to the air, water, or land |
| recycle | to change something so it can be used again |
| wetlands | areas of land that are sometimes or always filled with water |
| habitat | the place where an organism lives |
| environment | all the things that surround an organism |
