| A | B |
| weather | day to day conditions of Earth's atmosphere |
| climate | year after year patterns of temperature and precipitation |
| microclimate | environmental conditions within a small area that differs significantly from the climate of the surrounding area |
| greenhouse effect | process in which certain gases trap sunlight energy in the earth's atmosphere as heat |
| ecological succession | a series of gradual changes that occur in a community following a disturbance |
| primary succession | succession that occurs in an area which no trace of a previous community is present |
| secondary succession | type of succession that occurs in an area that was only partially destroyed by disturbances |
| pioneer species | the first species to populate an area during succession |
| lichen | mutalistic symbiosis between fungus an algae |