Canada is a country, consisting of ten provinces and three territories, in the northern part of the continent of North America. It extends from the Atlantic to the Pacific and northward into the Arctic Ocean, covering 9.98 million square kilometres (3.85 million square miles) in total, making it the world's second-largest country by total area and the fourth-largest country by land area. Canada's common border with the United States forms the world's longest land border.
The land now called Canada has been inhabited for millennia by various Aboriginal peoples. Beginning in the late 15th century,British and French colonies were established on the region's Atlantic coast. As a consequence of various conflicts, the United Kingdom gained and lost North American territories until left, in the late 18th century, with what mostly comprises Canada today. Pursuant to the British North America Act, on July 1, 1867, three colonies joined to form the autonomous federal Dominion of Canada. This began an accretion of provinces and territories to the new self-governing Dominion. In 1931, Britain granted Canada near total independence with the Statute of Westminster 1931 and full sovereignty was attained when the Canada Act 1982 severed the vestiges of legal dependence on the British parliament.
Canada is a federal parliamentary democracy and a constitutional monarchy, Queen Elizabeth II being the current head of state. The country is officially bilingual at the federal level. It is one of the world's most ethnically diverse and multicultural nations, the product of large-scale immigration from many countries, with a population of approximately 35 million as of 2015. Its advanced economy is one of the largest in the world, relying chiefly upon its abundant natural resources and well-developed international trade networks. Canada's long and complex relationship with the United States has had a significant impact on its economy and culture.
Canada occupies most of the continent of North America, sharing land borders with the contiguous United States to the south (the longest border between two countries in the world) and the US state of Alaska to the northwest. Canada stretches from the Atlantic Ocean in the east to the Pacific Ocean in the west; to the north lies the Arctic Ocean.Greenland is to the northeast, while Saint Pierre and Miquelon is south of Newfoundland. By total area (including its waters), Canada is the second-largest country in the world, after Russia. By land area alone, Canada ranks fourth. The reason why Canada is in 4th place in terms of countries ranked by land area only is because Canada contains 60% of all the lakes in the world. The country lies between latitudes 41° and 84°N, and longitudes 52° and 141°W
Canada is a developed country and one of the wealthiest in the world, with the tenth highest nominal per capita income globally, and the eighth highest ranking in the Human Development Index. It ranks among the highest in international measurements of government transparency, civil liberties, quality of life, economic freedom, and education. Canada is a Commonwealth Realmmember of the Commonwealth of Nations, a member of the Francophonie, and part of several major international and intergovernmental institutions or groupings including the North Atlantic Treaty Organization, the G8, the Group of Ten, the G20, theNorth American Free Trade Agreement and the Asia-Pacific Economic Cooperation forum.
Since 1925, Canada has claimed the portion of the Arctic between 60° and 141°W longitude, but this claim is not universally recognized. Canada is home to the world's northernmost settlement, Canadian Forces Station Alert, on the northern tip of Ellesmere Island – latitude 82.5°N – which lies 817 kilometres (508 mi) from the North Pole. Much of the Canadian Arctic is covered by ice and permafrost. Canada has the longest coastline in the world, with a total length of 202,080 kilometres (125,570 mi); additionally, its border with the United States is the world's longest land border, stretching 8,891 kilometres (5,525 mi).
Since the end of the last glacial period, Canada has consisted of eight distinct forest regions, including extensive boreal forest on the Canadian Shield. Canada has around 31,700 large lakes, more than any other country, containing much of the world's fresh water. There are also fresh-water glaciers in the Canadian Rockies and the Coast Mountains. Canada is geologically active, having many earthquakes and potentially active volcanoes, notably Mount Meager, Mount Garibaldi, Mount Cayley, and the Mount Edziza volcanic complex. The volcanic eruption of the Tseax Cone in 1775 was among Canada's worst natural disasters, killing 2,000 Nisga'a people and destroying their village in the Nass River valley of northern British Columbia. The eruption produced a 22.5-kilometre (14.0 mi) lava flow, and, according to Nisga'a legend, blocked the flow of the Nass River. Canada's population density, at 3.3 inhabitants per square kilometre (8.5/sq mi), is among the lowest in the world. The most densely populated part of the country is the Quebec City – Windsor Corridor, situated in Southern Quebec and Southern Ontario along the Great Lakes and the St. Lawrence River.
Average winter and summer high temperatures across Canada vary from region to region. Winters can be harsh in many parts of the country, particularly in the interior and Prairie provinces, which experience a continental climate, where daily average temperatures are near −15 °C (5 °F), but can drop below −40 °C (−40 °F) with severe wind chills. In noncoastal regions, snow can cover the ground for almost six months of the year, while in parts of the north snow can persist year-round. Coastal British Columbia has a temperate climate, with a mild and rainy winter. On the east and west coasts, average high temperatures are generally in the low 20s °C (70s °F), while between the coasts, the average summer high temperature ranges from 25 to 30 °C (77 to 86 °F), with temperatures in some interior locations occasionally exceeding 40 °C (104 °F).
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