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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.
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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. |
