| A | B |
| weather | day-to-day condition of the atmosphere |
| climate | temperature and precipitation over a LONG period of time (many years) |
| microclimate | when the environmental conditions change over small distances |
| greenhouse effect | process where some gases trap sunlight energy in the earth's atmosphere as heat |
| tolerance | ability to survive and have babies in a range of environmental circumstances |
| habitat | place where an organism lives |
| niche | the physical and biological conditions where a species lives AND how it gets what it needs to live and make babies |
| resource | anything an organism needs to live (water, nutrients, light, food, space) |
| competitive exclusion principle | no two species can have the same niche in the same habitat at the same time |
| predation | when one animals gets and eats another animal |
| prey | the animal that is eaten |
| predator | the animal that catches and eats another animal |
| herbivory | when an herbivore (animal) eats a producer (plant) |
| keystone species | one species that can cause big changes in the whole community if it changes |
| symbiosis | living together |
| mutualism | a relationship of organisms where good things happen to both organisms |
| parasitism | a relationship of organisms where one organism lives inside or on another organism and hurts it |
| commensalism | a relationships of organisms where one organism has something good happen to it and the other one stays the same |