| A | B |
|---|
| Biodiversity | Variety of life in an area |
| Extinction | Disappearance of species |
| Threatened species | Species that have rapidly decreasing numbers of individuals. |
| Endangered species | Species in which the number of individuals falls so low that extinction is possible. |
| Habitat fragmentation | Separation of wilderness areas |
| Edge effect | The different conditions along ecosystem boundaries |
| Habitat degradation | Damage to a habitat by pollution |
| Acid rain | precipitation with low pH levels |
| Exotic species | Organisms not native to the particular area |
| threatened | African elephant is an example of a (n)_______species |
| extinct | Dodo bird is an example of a (n)_______species. |
| endangered | The black rhinoceros is an example of a(n) ______species. |
