| A | B |
| environment | all of the physical surroundings of an organism |
| nonexhaustible | a natural resource that does not run out |
| renewable | a natural resource that can be replaced as it is used |
| exhaustible | a natural resource that exists in limited quantity |
| ecology | the study of the relationship between living things |
| environmentalist | social or political activities undertaken for the purpose of affecting some aspect of the environment |
| amoral | not considering moral questions |
| food chain | a group of plants/animals related to each other by the fact that one feeds/depends on the next |
| producer | an organism that extracts energy, water, minerals, and other compounds from the environment |
| transformer | an organism that takes primary food sources from the producers |
| decomposer | an organism that breaks down other organisms |
| biome | a major land area characterized by dominants plant life forms |
| biogeographical | the study of the distribution of biological organisms throughout the world |
| balance of natrue | the tendency of ecosystems to reach a general state of equalibrium |
| carrying capacity | the number of wildlife an area can support with food |
| population level | the number of a given animal in a specific geographical area |
| preservation | an attemt to prevent the use of some natural resources |
| multiple use | the concept that a natural resource can be used for more than one function |
| ecosystem | a community of interrelated plants and animals |