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| Question | Answer |
| Species | A group of organisms that can interbreed to create fertile offspring |
| Population | A relatively isolated group of organisms of the same species |
| Community | The organisms of all species living in a particular area |
| Habitat | Where a population lives |
| Biotic factors | Fcators affecting an organsim related to living organism |
| Abiotic factors | Factors affecting an organism related to non - living things |
| Niche | A role played within a communtiy eg. a top preadtor or its way of life |
| Food chain | A sequence (usually shown as a diagram) of feeding relationships between organisms, showing who eats what and the movement of energy through trophic levels. |
| Biomass | The dry mass of an organism |
| Decomposer | An organism which eats dead organisms or animal droppings, and breaks them down into simple materials. |
| food web | A network of food chains, showing how they all link together. |
| photosynthesis | A chemical process used by plants and algae to make glucose and oxygen from carbon dioxide and water, using light energy. Oxygen is produced as a by-product of photosynthesis. |
| primary consumer | The name given to an organism that eats a producer. A herbivore |
| producer | Plants that begin food chains by making energy from carbon dioxide and water. |
| secondary consumer | An organism that obtains its energy by eating the primary consumer.secondary consumer |
| tertiary consumer | An organism that obtains its energy by eating the secondary consumer. |
| trophic level | The position of an organism in a food chain, food web or pyramid. |
| invertebrate | An animal without a backbone |
| organism | Living entity, eg animals, plants or microorganisms. |
| herbivore | An animal that feeds only on plants. |
| carnivore | An animal that eats meat or flesh only. |
| Omnivore | An animal that eat both meat and plants |
| Pyramids of number | A graphical way of representng the number of organisms in a food chain |
| Pyramids of biomass | Pyramids of biomass represent the dry mass of organisms in a food chian |
| Pyramids of energy | These represent the energy contained within the organisms in each trophoic level |
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