| A | B |
|---|
| ecoregion | a large area of land or water that contains a characteristic and distinct group of natural communities and species |
| playa lake | a nearly level surface that is located in the lowest part of a desert basin and covered by shallow water |
| plateau | a large, flat area that is higher than the surrounding area |
| marsh | a treeless wetland ecosystem where plants such as grasses grow |
| prairie | a large, treeless area of land characterized by deep, fertile soil in which grass and plants with soft, green stems grow |
| montane | a mountainous area of land in which evergreens are the main form of plant life |
| plain | an area of land that is flat or has gentle slopes and small variations in elevation |
| woodland | an ecosystem in which trees are the dorminant form of plant life |
