| A | B |
|---|
| FOOD CHAIN | the path energy and materials take in a community |
| SUCCESSION | the series of changes that naturally take place in a community over time |
| ECOLOGY | the study of relationship living and nonliving things |
| EXTINCT | no longer existing |
| BIRTHRATE | the number of organisms born during a given periof of time. |
| PIONEER STAGE | the FIRST stage of succession |
| HABITAT | the place where an organism lives |
| CLIMAX COMMUNITY | the FINAL stage of succession |
| DEATH RATE | the number of organisms that die during a given period of time |
| TERRITORY | an area of animal or group of animals that DEFENDS from others of the same speices |
| NON-LIVING parts of the ecosystem | air, soil, sand, and water |
| LIVING parts of the ecosystem | animals, plants |
| HABITAT | the place where something lives |
| NICHE | what a species does (such as what it eats) |
| 2 THINGS ANIMALS COMPETE FOR: | food and space |
| POPULATIONS change NATURALLY BY: | birth rate, death rates, and natural disasters |
| PEOPLE change the populations by: | polluting and hunting |
| PRODUCERS.... | make food |
| CONSUMERS... | eat producers and consumers |
| DECOMPOSERS... | break down organisms |
