| A | B |
|---|
| disease | illness that can be caused by bacteria or mold |
| drought | a long period of time with no rain |
| exotic species | species that are new to an environment |
| invasive species | an exotic species that cannot be easily controlled |
| natural disaster | a flood is an example of this |
| pollution | harmful materials that get into air, land, or water |
| species | a kind of organism |
| wildfire | can start when lightning strikes a dry area |
| environment | the land, water, and air that make up an organism's home |
| natural | the way something is found in nature |
