World

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Topography Returns to the page head

    On Earth's land and the sea total area approximately 510 million square kilometers, sea area approximately 361 million square kilometers, account for the global total area 71%, the land area approximately 149 million square kilometers, account for the global total area 29%. On the Earth the sea company becomes a piece, but land then mutually separates. The land mainly distributes in Northern Hemisphere, the eastern hemisphere, the sea mainly distributes in the southern hemisphere, the The Western Hemisphere. The North Pole area is sea, the south pole area is together the land.
    The land average altitude above sea level is 875 meters. Roughly divides into the mainland, the peninsula and the islands. The whole world has six mainland, according to the area size is in turn Asia-Europe continent, the African continent, the North America mainland, the South America mainland, the Antarctica, the Australian mainland. The mainland and nearby it the islands always are called the continent. The whole world has seven big continents, according to the area size is in turn Asia, Africa, North America, the South America, the antarctica, Europe and Oceania. The islands are spread in the sea, the rivers or the lake scrap land. Each other is distanced nearer crowd of islands to call the archipelago. The world islands total area is more than 9.7 million square kilometers, approximately composes the world land total area 1,/15. In the world the area biggest island is the Greenland island. The peninsula is the land enters the sea or the lake part, is at the same time connected with the land, other by water surrounding. In the world the biggest peninsula is west Asia's Arabian Peninsula.
    The sea average depth is 3,795 meters. Including ocean, sea and channel. The ocean is the sea main body are partial, in the world has the Pacific Ocean, Atlantic, Indian Ocean and the Arctic Ocean four oceans. The sea is the sea edge are partial, in the world the biggest sea is the Australian northeast side Cay Sea, the channel is the beginnings and ends connection sea narrow canal.
    Earth's surface height disparate, the shape is diverse. The land roughly may divide into the plain, the mountainous region, the plateau, the knoll and the basin five kind of terrains. In the world the biggest plain is the South America amazon plain. In the world big sierra has North America 迪勒 to pull the mountain system, south Asia's Himalaya Mountains, northeast Europe's Alps, Africa to the South America branch 阿特拉斯 the sierra and so on. The Mount Everest elevation 8,848 meters, are Earth's peaks. In the world the highest plateau is China's Qinghai-Tibet Plain.
    The seabed terrain roughly divides into the continental shelf, landmass and the ocean floor three parts. The ocean floor is the sea main body are partial. Approximately composes the sea total area 80%. The seabed landform has the sea range, the oceanic basin, the oceanic trench, the sea earthen mound, the seamount, fosse and the oceanic plateau and so on.

Political area Returns to the page head

    The world altogether has 230 countries and the area. According to United Nations economic society information and policy analysis department population place material. In 2005 the world total population is 6.4 billion, developed country population 1.18 billion (accounts for total population 20%), the developing nation population 4.59 billion (accounts for total population 80%).
    Asia, some 49 countries and the area, the area 44 million square kilometers (including islands area, similarly hereinafter), approximately compose the world land total area 29.4%. The inhabitant 3.49 billion, approximately composes the world population total 60.5%.
    Europe, some 45 countries and the area, the area 10.16 million square kilometers, approximately compose the world land total area 6.8%. The inhabitant 730 million, approximately composes the world population total 12.65%.
    Africa, some 56 countries and area. The area 30.2 million square kilometers, approximately select the world land total area 20.2%. Comes between approximately 740 million, approximately composes the world population total 12.8%.
    Oceania, some 30 countries and the area, the land total area 8.97 million square kilometers, approximately select the world land total area 6%. The inhabitant 30 million, accounts for the world population total 0.5%.
    North America, some 28 countries and the area, the area 24.228 million square kilometers, approximately compose the world land total area 16.2%, the inhabitant 460 million, approximately composes the world population total 8%.
    South America, some 13 countries and area. The area 17.97 million square kilometers, approximately compose the world land total area 12%. The inhabitant 320 million, approximately composes the world population total 5.55%.
    South the level continent, the area approximately 14 million square kilometers, approximately compose the world land total area 9.4%. At present still indefinitely occupied the population.

Correlation link Returns to the page head

The world knowledge, The World Factbook .