| A | B |
|---|
| Abiotic factor | nonliving parts of the environment |
| Biotic factor | Living parts of the environment |
| Biosphere | region of earth where all life is found |
| commensalism | 2 organisms where one is helped and the other isn't affected |
| Food chain | diagram which shows what eats what |
| Niche | role an organism plays in a community |
| habitat | place where an organism lives |
| limiting factor | something that causes the population to decrease |
| food web | diagram of overlapping food chains |
| population | organisms of one species living together |
| community | all populations living in the same place at the same time |
| ecosystem | community and abiotic factors |
| water cycle | continous movement of water in the biosphere |
| ecological pyramid | diagram that shows energy flow from producers to consumers |
| producer | green plant, something that makes its own food |
| consumer | eater |
| herbivore | plant eater |
| omnivore | eats plants and animals |
| carnivore | meat eater |
| predator | hunts, kills and eats prey |
| ecology | study of organisms and the environment |
| mutualism | 2 organisms where BOTH are helped |
| parasitism | 2 organisms where one is helped and the other is harmed |
| symbiosis | close relationship between 2 or more species |
| nitrogen cycle | transfer of nitrogen from the atmosphere to plants and back |
