| A | B |
| ecology | interactions of living organisms with one another and with their physical environment |
| habitat | place where organisms live |
| community | different species that live together in a habitat |
| ecosystems | community and all physical aspects of a habitat |
| abiotic factors | non-living or physical aspects of a habitat |
| biotic factors | living things/organisms in a habita |
| biodiversity | variety of organisms,communities,& ecosystems |
| pioneer species | first organisms to live in a new habitat,small-fast growing plants |
| succession | regular progression of species replacement |
| primary succession | occurs where life has not existed before |
| secondary succession | occurs in an area where there has been previous growth;abandoned fields or forest clearings |