| A | B |
|---|
| carnivore | meat eating |
| herbivore | plant eating |
| omnivore | meat and plant eater |
| niche | role of an organism |
| abiotic | nonliving parts-ecosystem |
| biotic | living parts of ecosystem |
| decomposer | breaks down dead organism |
| ecology | study of relationships of living things with one another |
| habitat | place where an organism lives |
| food web | interconnecting food chains |
| food chain | food and energy links between plants and animals |
| producer | source of food |
| community | all the living parts of an ecosystem that live together |
| predation | one organism kills and consumes another |
| competition | struggle between organisms to get things to survive |
| symbiosis | close relationship between two organisms |
| commensalism | one benefits-other not harmed |
| mutualism | both organisms benefit |
| parasitism | one organism benefits the other is harmed |
| oxygen | makes up 20 per cent of the atmosphere |
| free nitrogen | makes up 78 per cent of the atmosphere |
