| Term | Definition |
| biome | One of Earth's large ecosystems, with its own kind of climate, soil, plants and animals |
| grassland | A biome where grasses not trees, are the main plant life. |
| taiga | a cool forest biome of conifers in the upper Northern Hemisphere |
| tundra | large, treeless plain in the arctic regions, where the ground is froze all year |
| desert | a sandy or rocky biome, with little precipitation and little plant life |
| deciduous forest | a forest biome with many kinds of trees that lose their leaves each autumn |
| tropical rain forest | a hot biome near the equator, with much rainfall and a wide variety of life |