| A | B |
|---|
| Ecosystem | an area which living things interact with one another and with their envornment |
| biotic factors | living parts of an ecosystem |
| abotic factors | nonliving parts of an ecosystem |
| community | when two or more of differnt organisms interact with each other in the same area |
| population | all organisms of the same species living in the same area |
| niche | specific role of an organism has in its habitat |
| food chain | sequence of events when food energy is passed from oneorganism to another |
| producers | plants that produce their own food |
| consumers | organisms that eat other livng things |
| food web | network of different food chains that connect feeding realtionships |
| energy pyramid | diagram that shows amount of energy avalible at each level of the food chain |
| evaperation | process of the energy from the sun changing from a liquid to a gas |
| condensation | process of atmosphere's tempature cools, water vapor changes back to a liquid |
| precipitaion | when condensed water forms clouds, steam, or fog and eventally falls back to earth |
| nitrogen fixation | process of changing atmospheric nitrogen into usuable compounds |
| succession | replacement of one community by another over a period of time |
| climate | year-year weather patterns |
| biomes | large communities with simalar abiotic and biotic factors |
| tropical | climate has warm tematures year round |
| polar | climare has long cold seasons and short warm seasons |
| temperate | climare has cold season and warm season that are about equal in length |
| tundra | biome with low average temps. little rainfall and short growing season |
| deciduous | trees that loose their leaves durig one season and grow new ones during another |
| conifrous | biome with long cold winters of heavy snowfall and 3-6 month growing season |
| grassland | biome that are charaterized by grasses |
| deserts | areas that have greater rates of evaporation than rainfall |
| marine | ocean envornment |
| renewable resources | recsources that can be replaced by natural cycles or proccess |
| nonrenewable resources | resources that can't be replaced |
| fossil fuels | fuels formed from buried remains of decayed plants and animals that lived a lonf time ago |
| solar energy | energy from the sun |
| biomass energy | energy from plants |
| geothermal energy | energy form the heat from the earth |
| nuclear energy | energy from certain elemants being splitted apart |
| smog | one result of air pollution |
| acid rain | precipitation with pH below 5.6 |
| hazardous wastes | substances that are bery harmful to human and other organisms |
