At the founding, America adopted the Western concepts of civil marriage and family, in which the mother played the primary role (shared with the father) in nurturing children, with the formation of character and moral values as essential objectives.
Tundra climate, major climate type of the KÃ¶ppen classification characterized by sub-freezing mean annual temperatures, large annual temperature ranges (but not as large as in the adjacent continental subarctic climate), and moderately low precipitation.
The tundra is a biome characterized by an extremely cold climate, little precipitation, poor nutrients, and a short growing season. Other characteristics include low biodiversity, simple plants, limited drainage, and large variations in populations. There are two types of tundra: arctic and alpine.