United states and Canada similarities

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Across
  1. 2. Angular distance from a point on the Earth's surface to the parallel of the equator
  2. 7. Each ecological unit into which the biosphere is divided according to a set of climatic and geological factors that determine the type of vegetation and fauna.
  3. 9. Portion of land surrounded by water everywhere.
  4. 12. Set of assets, wealth or means of subsistence.
  5. 13. System of production, distribution, trade and consumption of goods and services of a society or a country.
  6. 14. Set of plants typical of an area or a place or existing on a given land.
  7. 16. Surrounding or circulating around a body.
  8. 17. the events and facts that belong to the past time and that constitute the development of humanity from its origins to the present moment
  9. 18. A set of unspecialized knowledge and ideas acquired through the development of intellectual faculties, through reading, study and work.
  10. 19. Flat and grassy place, generally in the field.
  11. 20. From the area immediately south of or related to the Arctic region.
Down
  1. 1. That is depopulated or uninhabited
  2. 3. Vegetation typical of cold climates that includes mosses, lichens and some dwarf trees.
  3. 4. Set of people and organizations that govern or direct a political-administrative division
  4. 5. zones: Climate classification systems are ways of classifying the world's climates.
  5. 6. zones are characterized by monthly average temperatures of 18 ℃ (64.4 ℉) or higher year-round, and have high levels of precipitation
  6. 8. is any product of the condensation of atmospheric water vapour that falls under gravity from clouds.
  7. 10. Large expanse of land separated by the oceans and, in general, by certain geographical features.
  8. 11. Territory that constitutes a homogeneous unit in a certain aspect due to historical, political, geographic, climatic, cultural circumstances
  9. 15. Long and narrow strip of land that connects two continent.