| A | B |
|---|
| producers | food makers |
| consumers | feed on other living things |
| first level consumer | eat producers |
| second level consumer | eat first level consumer |
| food chain | starts with a producer |
| predator | animal that eats othjer animals |
| prey | gets eaten |
| herbivores | eat plants |
| carnivores | eat meat |
| omnivores | eat everything |
| decomposer | break down wastes and dead organisms |
| scavenger | feeds on dead animals |
| decay bacteria | type of decomposer |
| fungi | type of decomposer |
| food web | two or more food chains that are linked |
| food pyramid | shows how much food each predator eats |
| population density | number of individuals in a specific area |
| immigration | moving in |
| emmigration | moving out |
| limiting conditions | environmental factor that prevents population growth |
| biome | ecosystems with similar climates and organisms |
| rainforest | warm and humid climate |
| canopy | top layer of trees |
| understory | shorter layer of trees |
| desert | gets less than 25 cm of rain per year |
| grassland | 25-75 cm of rain per year |
| savanna | more than 120cm of rain per year |
| deciduous trees | drop their leaves |
| coniferous trees | produce cones |
| tundra | cold and dry |
| permafrost | frozen soil |
| estuary | where fresh water meets salt water |
| intertidal zone | part of shore between high and low tide line |
| niche | organisms particular role |
| competition | stuggle to survive |
| predation | eats another organism |
| symbiosis | animal relationship in which one benefits |
| mutualism | both species benefit |
| commensalism | one benefits other not harmed |
| parasitism | one organism lives on another and harms it |
| host | organism it lives on |
| succession | series of predictable changes |
| primary succession | succession where no ecosystem previously existed |
| pioneer species | first species |
| ecosystem | all living and nonliving things in an area |
| habitat | place where an organism lives |
| abiotic factors | non living parts of an ecosystem |
| biotic factors | living parts of an ecosystem |
| ecology | study of how living things interact |
| species | group of organisms similar and can reproduce |
