| A | B |
|---|
| biome | A large group of ecosystems that share the same climax community. |
| photic zone | Portion of marine biome that sunlight reaches. |
| aphotic zone | Deep water that never receives sunlight. |
| estuary | A coastal body of water in which fresh and salt water mix. |
| intertidal zone | Portion of the shoreline that lies between high and low tides. |
| plankton | Small organisms that live in the waters of the photic zone. |
| tundra | Cold, treeless land with long summer days and short periods of winter light. |
| permafrost | Ground that is permanently frozen in the tundra. |
| taiga | Cold biome with lots of coniferous plants. |
| desert | Arid region with sparse to almost nonexistent plant life. |
| grassland | Large communities covered with grasses and small plants. |
| temperate forest | Biome dominated by broad-leaved deciduous trees that lose their leaves in the Fall. |
| tropical rain forest | Biome with warm temperatures, wet weather, and lush plant life. |
