| A | B |
|---|
| weather | day to day conditions of earth atmosphere |
| climate | year to year of temperature |
| greenhouse effect | the trapping of gases by atmosphere |
| polar zone | area where sun rays hit at low angles |
| temperate zone | area between polar and tropical zone |
| tropical zone | area near equator |
| biotic factor | biological factors that affect organsims |
| abiotic factor | nonliving factors , affect living things, ex, water, air, land |
| habitat | area an organism lives |
| niche | physical and biological conditions of how organisms live, where it lives and how it lives |
| resource | necessity of life, ex food |
| competitive exclusion principle | no two species can occupy same niche in same habitat at same time |
| predation | one organism captures and feeds on another |
| symbiosis | two species live close together, three types |
| mutualism | both species benefit from each other, ex bees and flowers |
| commensalism | one species benefits and other is neither harmed or helped |
| parasitism | one organism lives in or on another. ex ticks on a dog |
| ecological succession | series of predictable changes over time |
| primary succession | occurs on area where no soil existed, ex grass on sidewalk |
| pioneer species | the first species in a region |
| secondary succession | the restoration of the ecosystem to original, ex, after a fire, the grass regrows |
