| A | B |
| Any organism that makes its own food | producer |
| An organism that eats other living things to get energy | consumer |
| An organism that breaks down the remains of dead organisms | decomposer |
| All living & nonliving things that exist & interact in one place | ecosystem |
| All the organisms of the same kind that live in an ecosystem | population |
| All the organisms that live in the same ecosystem & interact with each other | community |
| The place where an organism lives | habitat |
| The path of energy in an ecosystem as one living thing eats another | food chain |
| Two or more food chains that overlap | food web |
| An animal that hunts other animals for food | predator |
| An animal that is hunted for food by a predator | prey |
| An animal that eats only plants | herbivore |
| An animal that eats only other animals | carnivore |
| An animal that eats both plants & animals | omnivore |
| A physical feature or behavior that helps an organism survive in its habitat | adaptation |
| A physical appearance that helps an animal blend in with its surroundings | camouflage |
| Looking like another animal or plant | mimicry |
| A long deep sleep | hibernation |
| When there is very little of something, such as food | scarcity |
| When the number of a species living is very low | endangered |
| When the last member of a species has died | extinct |