| A | B |
|---|
| population | individuals of the same kind |
| individual | a single organism |
| community | all the populations of one ecosystem |
| ecosystem | a community and its nonliving things |
| ecology | the study of the relationship of living and nonliving things |
| habitat | the place where an organism lives |
| niche | how an organism spends its time |
| population density | number of species in an area |
| territory | area an animal defends |
| predator | animals that kill and eat others |
| prey | animals that kill and eat others |
| consumer | things that depend on producers for food |
| producer | organisms that depend on sunlight for food |
| decomposer | organisms that break down dead organisms into nutrients |
| scavenger | a consumer that eats dead plants and animals |
| herbivore | organism that eats plants |
| carnivore | organism that eats other animals |
| omnivore | organism that eats plants and animals |
| food chain | ways in which organisms in ecosystems are connected with one another |
| limiting factor | the amount of food that is available |
