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 ecology of the tundra is controlled by the cold climate and the northern latitude. The former means that a unique soil structure, permafrost, forms and dominates the biology. Permafrost is a layer of soil that remains frozen year-round.