| A | B |
|---|
| population | group of organisms of one kind that live in one location |
| community | group of populations that live together |
| competition | kind of contest among populations that need to get a certain amount of food, water, and shelter to survive |
| adaptation | trait or characteristic that helps an organism survive |
| symbiosis | relationship between different kinds of organisms |
| predator | animal that kills and eats other animals |
| prey | animal that is eaten by a predator |
| succession | a gradual change in the kinds of organisms living in an ecosystem |
| extinction | death of all the organisms of a species |
| pollution | anything that dirties or harms the environment |
| acid rain | mixture that falls to Earth of rain and acids from air pollution |
| habitat | area where an organism find everything it needs to survive |
| conservation | practice of saving resources |
| reclamation | process of leaning and restoring a damaged ecosystem |
