七大洲即亚洲、非洲、北美洲、南美洲、南极洲、欧洲、大洋州。
四大洋即太平洋、大西洋、印度洋和北冰洋。
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亚洲:面积4400万平方千米，约占世界陆地总面积的29.4%，是世界第一大洲。共有40个国家和地区。人口32.29亿，约占世界总人口的60%，居世界第一位。是世界七大洲中面积最大的洲。其绝大部分土地位于东半球和北半球。传统上被定义为非洲-亚欧大陆的一部分。跨越经纬度十分广，东西时差达11小时。亚洲地跨寒、温、热三带，气候基本特征是大陆性气候强烈，季风性气候典型，气候类型复杂。在地理上习惯分为东亚、东南亚、南亚、西亚、中亚和北亚。2000年人口达36.72亿人，约占世界总人口的60.5%。
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非洲:面积约3000万平方千米，约占世界陆地总面积的20.2%，是世界第二大洲。共有56个国家和地区。人口6.62亿，占世界总人口的12.3%，居世界第三位。非洲是世界第二大陆。它形如一个巨大的不等边三角形，南窄北宽，地中海、红海、印度洋和大西洋环绕四周，沿海岛屿不多，最大的岛屿是马达加斯加岛。在非洲生息着不同肤色的居民，有黑人，也有白人，还有黄种人，其中黑人约占总人口的三分之二
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北美洲：面积约2400万平方千米，约占世界陆地总面积的16.2%，是世界第三大洲。共有37个国家和地区。人口4.32亿，约占世界总人口的8.1%，居世界第四位，大部分面积都为发达国家，有着极高的人类发展指数和经济水平，是思想最开放、最自由的大洲，其东临大西洋，西临太平洋，北临北冰洋，南以巴拿马运河为界与南美洲相分，东面隔丹麦海峡与欧洲隔海相望，地理位置优越。面积2422.8万Km²(包括附近岛屿)，约占世界陆地总面积的16.2%，是世界第三大洲。通用英语，其次是西班牙语、法语、荷兰语、印第安语等。北美洲的经济发展十分不平衡，除了美国与加拿大两国为发达国家，其余的国家都为发展中国家。
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南美洲:面积约1800万平方千米，约占世界陆地总面积的12%，是世界第四大洲。共有13个国家和地区。人口3.02亿，约占世界总人口的5.6%，居世界第五位。南美洲是第四大的大洲，陆地面积刚刚超过1780万平方千米。安第斯山脉几乎纵贯整个南美洲西部，拥有美洲最高的山峰--阿空加瓜山。安第斯山脉东部就是面积广大的亚马孙河盆地，占地超过700万平方千米，大部分地区都是热带雨林。
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南极洲:面积1400万平方千米，约占世界陆总面积的9.4%，是世界第五大洲。南极洲仅有一些来自其它大陆的科学考察人员和捕鲸队，无定居居民。南极洲整个大陆只有2%的地方无长年冰雪覆盖，动植物能够生存。气候酷寒，极端最低气温曾达-89.2℃。风速一般达每秒17~18米，最大达每秒90米以上，为世界最冷和风暴最多、风力最大的陆地。全洲年平均降水量为55毫米，极点附近几乎无降水，空气非常干燥，有“白色荒漠”之称。在南极圈内暖季有连续的极昼，寒季则有连续的极夜，并有绚丽的弧形极光出现。动物有企鹅、海象、海狮、信天翁等。附近海洋产南极鳕鱼、大口鱼等，磷虾产量全球最大。已发现矿物有煤、石油、天然气、金、银、镍、钼、锰、铀等.主要分布在南极半岛及沿海岛屿地区。
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欧洲:面积约1000万平方千米，约占世界陆地总面积的6.8%，仅大于大洋洲，是世界第六大洲。共有37个国家和地区。人口7.23亿，约占世界总人口的13.4%，居世界第二位，是人口密度最大的一洲。欧洲是人类生活水平较高、环境以及人类发展指数较高及适宜居住的大洲之一
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大洋洲:面积约900万平方千米，约占世界陆地总面积的6%，是世界上最小的一个洲。共有24个国家和地区。人口2700万，约占世界总人口的0.5%，是除南极洲外，世界人口最少的一洲。位于太平洋中部和中南部的赤道南北广大海域中，在亚洲和南极洲之间，西邻印度洋，东临太平洋，并与南北美洲遥遥相对。
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太平洋：地球第一大洋，覆盖着地球约46%的水面以及约32.5%的总面积。太平洋跨度从南极大陆海岸延伸至白令海峡，西面为亚洲、大洋洲，东面则为美洲。南北最宽15500千米，跨越151°纬度。包括属海的面积为18134.423万平方千米。
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印度洋：是世界的第三大洋。位于亚洲、大洋洲、非洲和南极洲之间。包括属海的面积为7411.8万平方千米，不包括属海的面积为7342.7万平方千米，约占世界海洋总面积的20%。包括属海的体积为28460.8万立方千米，不包括属海的体积为28434万立方千米。印度洋的平均深度仅次于太平洋，位居第二，包括属海的平均深度为3839.9米，不包括属海的平均深度为3872.4米。最深为9074米。
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北冰洋：又称北极海，是世界最小最浅以及最冷的大洋。大致以北极圈为中心，位于地球的最北端，被亚欧大陆和北美大陆环抱着，有狭窄的白令海峡与太平洋相通;通过格陵兰海和许多海峡与大西洋相连，是世界大洋中最小的一个，面积仅为1475万平方千米，不到太平洋的10%。它的深度为1097米，最深为5527米。古希腊曾把它叫做"正对大熊星座的海洋"。1845年，英国伦敦地理学会命名，经汉文翻译为北冰洋。洋名Arctic源于希腊语，意指正对着大熊星座的海洋。)2012年8月25日，北冰洋海冰面积达观测史以来最小
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大西洋：是世界第二大洋，占地球表面积的近20%，原面积8221.7万平方千米，在南冰洋成立后，面积调整为7676.2万平方千米，平均深度3627米，最深处波多黎各海沟深达9219米。大西洋呈"S"型，以赤道为界被划分成北大西洋和南大西洋。此外，大西洋还有数个附属海，较大的如地中海、加勒比海、北海、波罗的海、墨西哥湾等。大西洋南北距离甚远，故气候多样，自北部格陵兰岛的极地气候，直至西非、巴西沿岸的热带沙漠或雨林气候，大西洋都囊括其中。而在欧洲、美国、加拿大以及巴西和几内亚湾以南的海域则常年出现大风浪。
The seven continents are Asia, Africa,North America, South America, Antarctica, Europe and Oceania.
The four oceans are the Pacific, Atlantic,Indian and Arctic oceans.
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Asia: 44 million square kilometers,accounting for 29.4% of the world's total land area, is the world's largestcontinent. There are 40 countries and regions. Population of 3.229 billion,accounting for about 60% of the world's total population, ranking first in theworld. It is the largest of the seven continents in the world. The vastmajority of its land is located in the Eastern and Northern hemispheres.Traditionally defined as part of the Africa-Eurasia continent. Across thelatitude and longitude is very wide, the time difference between east and westis 11 hours. Asia spans three zones of cold, warm and hot, with a strongcontinental climate, typical monsoon climate and complex climate types.Geographically, it is used to be divided into East Asia, Southeast Asia, SouthAsia, West Asia, Central Asia and North Asia. In 2000, the population reached3.672 billion, accounting for about 60.5% of the world's total population.
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Africa: covers an area of about 30 millionsquare kilometers, accounting for 20.2% of the world's total land area, makingit the second largest continent in the world. There are 56 countries andregions. It has a population of 662 million, accounting for 12.3% of theworld's total population, ranking third in the world. Africa is the world'ssecond largest continent. It is shaped like a large scalene triangle, narrow inthe south and wide in the north. It is surrounded by the Mediterranean Sea, theRed Sea, the Indian Ocean and the Atlantic Ocean. There are not many coastalislands, the largest of which is Madagascar. Africa is inhabited by people ofdifferent colors, black, white, and yellow, with blacks accounting for abouttwo thirds of the population
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North America: an area of about 24 millionsquare kilometers, accounting for about 16.2% of the world's total land area,is the world's third largest continent. There are 37 countries and regions. Ithas a population of 432 million, accounting for 8.1% of the world's totalpopulation, ranking fourth in the world. Most of its area is developedcountries, and it has a high human development index and economic level. It isthe most open-minded and freest continent, with the Atlantic Ocean to the east,the Pacific Ocean to the west, the Arctic Ocean to the north, and South Americadivided by the Panama Canal to the south. East across the Danish Strait andEurope across the sea, the geographical position is advantageous. It covers anarea of 24.228 million square kilometers (including nearby islands), accountingfor 16.2% of the world's total land area, making it the third largest continentin the world. English is spoken, followed by Spanish, French, Dutch, Indian,etc. The economic development of North America is very unbalanced. Except theUnited States and Canada, which are developed countries, the rest of thecountries are developing countries.
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South America: an area of about 18 millionsquare kilometers, about 12% of the world's total land area, is the world'sfourth largest continent. There are 13 countries and regions. Population 302million, accounting for about 5.6% of the world's total population, ranking thefifth in the world. South America is the fourth largest continent, with a landarea of just over 17.8 million square kilometers. The Andes Mountains stretchacross almost all of western South America and are home to Aconcagua, thehighest mountain in the Americas. To the east of the Andes lies the vast AmazonBasin, which covers more than seven million square kilometers, much of ittropical rainforest.
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Antarctica: covers an area of 14 millionsquare kilometers, about 9.4 percent of the world's total land area, making itthe world's fifth largest continent. Antarctica has only a few scientificexplorers and whaling teams from other continents, and no settled people. Only2 percent of the continent is free of permanent snow and ice, allowing plantsand animals to survive. The climate is extremely cold, with the lowesttemperature ever reaching -89.2℃. The wind speed is generally 17 to 18 metersper second, and the maximum speed is over 90 meters per second, making it thecoldest, stormiest and windiest land in the world. The average annualprecipitation of the whole continent is 55 mm, almost no precipitation near thepole, the air is very dry, known as the "white desert". In theAntarctic Circle, warm seasons have continuous day, cold seasons havecontinuous polar night, and there are gorgeous arc-shaped aurora. The animalsare penguins, walruses, sea lions, albatrosses and so on. The nearby oceanproduces Antarctic cod, largemouth fish, krill production is the largest in theworld. Minerals have been discovered such as coal, oil, natural gas, gold,silver, nickel, molybdenum, manganese and uranium. Mainly distributed in theAntarctic Peninsula and coastal islands.
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Europe: About 10 million square kilometers,about 6.8% of the world's total land area, only larger than Oceania, is theworld's sixth largest continent. There are 37 countries and regions. Population723 million, accounting for about 13.4% of the world's total population,ranking the second in the world, is the most densely populated continent.Europe is one of the continents with a high standard of living, a high environmentaland human development index, and a habitable environment
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Oceania: About 9 million square kilometers,about 6% of the world's total land area, is the world's smallest continent.There are 24 countries and regions. With a population of 27 million, or about0.5% of the world's population, it is the least populated continent in theworld after Antarctica. Located in the central and south-central Pacific Ocean,between Asia and Antarctica, the Indian Ocean to the west, the Pacific Ocean tothe east, and North and South America.
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Pacific Ocean: The Earth's largest ocean,covering about 46% of the Earth's water surface and about 32.5% of its totalarea. The Pacific Ocean stretches from the coast of the Antarctic continent tothe Bering Strait, with Asia and Oceania in the west and the Americas in theeast. The maximum north-south width is 15,500 km, spanning 151° latitude. Thearea including the sea is 181,344,230 square kilometers.
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Indian Ocean: The third largest ocean inthe world. Located between Asia, Oceania, Africa and Antarctica. The areacovered by the sea is 74.118 million square kilometers, and the area notcovered by the sea is 73.427 million square kilometers, accounting for about 20percent of the world's total ocean area. The volume including the sea was284.608 million cubic km and the volume excluding the sea was 284.34 millioncubic km. The Indian Ocean has the second highest average depth after thePacific Ocean, with an average depth of 3,839.9 metres including the sea and3,872.4 metres excluding the sea. The deepest is 9,074 meters.
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Arctic Ocean: Also known as the Arctic Sea,it is the smallest, shallowest and coldest ocean in the world. Roughly centeredon the Arctic Circle, it is located at the northernmost point of the Earth,surrounded by the continents of Asia and Europe and North America, andconnected to the Pacific Ocean by the narrow Bering Strait; Connected to theAtlantic Ocean by the Greenland Sea and many straits, it is the smallest of theworld's oceans, covering only 14.75 million square kilometers, less than 10percent of the Pacific. It has a depth of 1,097 meters and a deepest of 5,527meters. The ancient Greeks called it "the sea opposite Ursa Major."In 1845, the Geographical Society of London named by the Chinese translation asthe Arctic Ocean. The name Arctic comes from the Greek word for the sea facingthe constellation Ursa Major.) On August 25, 2012, Arctic sea ice reached itssmallest extent ever observed
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Atlantic Ocean: The world's second largest
ocean, accounting for nearly 20% of the Earth's surface area, the original area
of 82.217 million square kilometers, after the establishment of the Southern
Ocean, the area of 76.762 million square kilometers, the average depth of 3,627
meters, the deepest Puerto Rico Trench is 9,219 meters deep. The Atlantic Ocean
has an "S" shape and is divided at the equator into the North
Atlantic and the South Atlantic. In addition, the Atlantic has several
subsidiary seas, the larger such as the Mediterranean Sea, the Caribbean Sea,
the North Sea, the Baltic Sea, the Gulf of Mexico and so on. The great distance
between north and south of the Atlantic Ocean gives it a variety of climates,
ranging from the polar climate of Greenland in the north to the tropical desert
or rain forest climate along the coasts of West Africa and Brazil. In Europe,
the United States, Canada and the waters south of Brazil and the Gulf of
Guinea,