| A | B |
| abiotic | nonliving factors that influence the types of plants and animals that live in an area |
| biome | a geographic area characterized by certain types of plant and animal communities |
| savanna | tropical grassland |
| desert | hot, dry regions |
| tundra | area where climate is so cold no trees grow |
| marine | ecosytem based on salty water |
| phytoplankton | most abundant producers in the ocean |
| zooplankton | very small consumers that eat phytoplankton |
| estuary | area where fresh water spills into the ocean. Salt and freshwater mix |
| tributary | stream or river that flows into a larger river |
| wetland | water level is almost always near or above ground |
| marsh | treeless wetland ecosystem |
| swamp | wetland ecosystem where trees & vines grow |