| A | B |
|---|
| weather | day-to-day condition of Earth's atmosphere |
| aphotic zone | area of the ocean that receives no light |
| greenhouse effect | heat is retained by Earth's atmosphere |
| polar | northernmost and southernmost climate zone |
| temperate | zone between polar and tropical zones |
| tropical | zone near the equator |
| biotic | living factors that can influence organisms within an ecosystem |
| abiotic | non-living factors that can influence organisms within an ecosystem |
| habitat | area in which an organism lives |
| niche | where an organism lives and how it uses the conidtions around it |
| resource | any necessity of life |
| predation | one organism captures and feeds on another |
| mutualism | relationship in which both organisms are helped |
| commensalism | relationship in which one organism is helped and the other is unaffected |
| parasitism | relationship in which one organism is helped and the other is harmed |
| primary succession | happens when new land is formed (such as a volcanic eruption) |
| secondary succession | happens on already existing land after a fire or other major event |
| pioneer species | first organisms to appear on new land |
| biome | particular physical environment that contains a characteristic assemblage of plants and animals |
| tundra | biome that features cold temperatures and permafrost |
| permafrost | layer of soil that is permanently frozen |
| desert | biome that gets less than 10 inches of rain a year |
| tropical rain forest | biome with the highest diversity of organisms |
| plankton | tiny free-floating organisms |
| phytoplankton | single-celled algae |
| zooplankton | single-celled animals |
| photic zone | area of the ocean that can receive light |
| climate | average, year-to-year conditions of temperature and precipitation |
