| A | B |
|---|
| biosphere | the part of the earth where life exists |
| ecology | the study of the interactions between organisms and their environment |
| ecosystem | a community of organisms and its abiotic environment |
| biome | a large region with a specific type of climate and certain types of plant and animal communities |
| biotic | describes living factors in the environment |
| abiotic | describes nonliving factors in the environment (water, soil, light, temperature) |
| habitat | the environment where an organism lives |
| niche | an organism's way of life and its relationships with its abiotic and biotic environments |
| population | a group of individuals of the same species that live together in the same area at the same time |
| community | all of the populations of different species that live and interact in an area |
| watershed | an area of land in which all the water that flows onto the land area eventually drains to the same outlet |
| wetlands | ecosystem that exists between terrestrial and aquatic ecosystems |
| terrestrial | land ecosystems |
| aquatic | water ecosystems |
