| A | B |
|---|
| ecosphere | the region where all life exists |
| community | all the organisms that live in a given area at a given time |
| population | the number of individual organisms that live in a given area at a given time |
| succession | the process where one or several species replace other species in a community |
| ecosystem | a community and its nonliving environment; and all the interactions that occur between populations |
| producers | make their own food;plants |
| consumers | an animal that feeds off other organisms |
| 1st level consumers | an animal that feeds directly on plants |
| herbivore | an animal that eats only plants |
| 2nd level consumers | an animal that feeds on first level consumers |
| carnivore | an animal that feeds only on other animals |
| omnivore | an animal that eats both plants and animals |
| 3rd level consumers | an animal that eats second level consumers |
| food chain | a relationship where animals feed on producers and other consumers |
| food web | the food chains that exist among the populations of a community |
| energy pyramid | shows the energy relationships between organisms |
| decomposers | an organism that breaks down the waste and remains of other animals |
| food cycle | how raw materials that are needed by living things are recycled within the ecosphere |
