| A | B |
|---|
| biome | a group of land ecosystems with similar climates and organisms |
| boreal forest | another name for a coniferous or boreal forest , trees are coniferous or evergreens |
| climate | the typical weather pattern in an area over a long period of time |
| coniferous tree | a tree that produces its seeds in cones and that has needle-shaped leaves |
| deciduous tree | a tree that sheds its leaves and grows new ones each year |
| grassland | an area populated by grasses and other nonwoody plants. Most grasslands get 25 to 75 centimeters of rain each year |
| permafrost | soil that is frozen all year |
| precipitation | rain, sleet, snow, or hail |
| savanna | a grassland close to the equator that receives as much as 120 centimeters of rain per year |
| tundra | an extremely cold, dry biome |
| desert | an area that receives less than 25 centimeters of precipitation per year |
| estuary | a habitat in which the fresh water of a river meets the salt water of the ocean |
| tropical rain forest | warm, humid biome near the equator |
| temperate rain forest | receives more than 300 centimeters of rain and has a moderate temperature |
| deciduous forest | receives at least 50 centimeters of rain per year, most of the trees shed their leaves and grow new ones each year |
| taiga | the Russian name for a coniferous or boreal forest, trees are coniferous or evergreens |
| coniferous forest | another name for a boreal forest or taiga, the trees are coniferous or evergreens |
| freshwater ecosystems | lates, streams, rivers, ponds, lakes |
| marine ecosystems | estuaries and ocean zones |
