CONTINENTS OF THE WORLD — LOCATION, AREA AND MAJOR FEATURES

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         Mehnat Aapki, Guidance Humari

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CONTINENTS OF THE WORLD — LOCATION, AREA AND MAJOR FEATURES

1. Introduction

• A continent is a very large continuous landmass forming a major division of the Earth’s surface.
• The commonly used geographical classification recognises seven continents—Asia, Africa, North America, South America, Antarctica, Europe and Australia.
• NCERT maps also present the world in terms of these major continental landmasses surrounded by the Pacific, Atlantic, Indian, Arctic and Southern Oceans. (NCERT)

2. Asia — Largest Continent

• Asia is the largest and most populous continent, covering roughly 44.5 million sq. km.
• It lies mainly in the Northern and Eastern Hemispheres and extends from the Arctic Ocean to the Indian Ocean.
• Asia contains the Himalayas, the Tibetan Plateau, vast Siberian plains, deserts and major river valleys.
• Mount Everest, 8,848.86 metres, on the Nepal–China boundary, is the world’s highest peak. NCERT also identifies Everest as Asia’s highest summit. (NCERT)

3. Africa — Second-Largest Continent

• Africa covers about 30.3 million sq. km and is crossed by both the Equator and the Prime Meridian.
• Its major physical features include the Sahara Desert, Ethiopian Highlands, East African Rift Valley and Congo Basin.
• The Nile, Congo, Niger and Zambezi are major rivers.
• Mount Kilimanjaro, about 5,895 metres high, is Africa’s highest mountain.

4. North America

• North America covers approximately 24.7 million sq. km and lies mainly in the Northern and Western Hemispheres.
• Major physical divisions include the Rocky Mountains, Great Plains, Canadian Shield and Appalachian Mountains.
• The Great Lakes and the Mississippi–Missouri river system are important geographical features.
• Denali, about 6,190 metres high, is its highest peak.

5. South America

• South America has an area of approximately 17.8 million sq. km.
• The Andes Mountains, the world’s longest continental mountain chain, extend along its western margin.
• The Amazon Basin contains the world’s largest tropical rainforest and one of its greatest river systems.
• Aconcagua, about 6,962 metres, is South America’s highest peak. (NCERT)

6. Antarctica

• Antarctica covers roughly 14 million sq. km and surrounds the South Pole.
• It is the coldest, driest and windiest continent, with most of its surface covered by a massive ice sheet.
• It has no permanent indigenous population; scientific research stations operate under the Antarctic Treaty framework.
• Vinson Massif, about 4,892 metres high, is its highest peak. (NCERT)

7. Europe

• Europe covers approximately 10.2 million sq. km and forms the western part of the larger Eurasian landmass.
• The Ural Mountains, Ural River, Caspian Sea and Caucasus region are commonly used in defining its conventional boundary with Asia.
• Major physical features include the European Plain, Alps and Scandinavian Mountains.
• Mount Elbrus, about 5,642 metres, is generally regarded as Europe’s highest peak. (NCERT)

8. Australia

• Australia is the smallest of the seven continents, covering about 7.7 million sq. km.
• It lies entirely in the Southern Hemisphere and is characterised by the Western Plateau, Central Lowlands and Eastern Highlands.
• The Great Barrier Reef off its north-eastern coast is the world’s largest coral-reef system.
• Mount Kosciuszko, about 2,228 metres, is the highest peak on mainland Australia. (NCERT)

9. Continental Formation

• Continents are not fixed features; their present distribution is the result of plate tectonics and continental drift over geological time.
• The breakup of ancient supercontinents such as Pangaea gradually produced the modern arrangement of landmasses.
• Ocean basins, mountain ranges and continental margins continue to evolve through tectonic, volcanic and depositional processes. (NCERT)

10. Overall Significance

• Continents provide the physical framework within which countries, ecosystems, cultures and economies have developed.
• They differ greatly in climate, relief, population, biodiversity, resources and levels of economic development.
• For examination purposes, the accepted descending order by area is: Asia → Africa → North America → South America → Antarctica → Europe → Australia.
• Understanding continents is fundamental to world geography because it helps explain global patterns of climate, vegetation, settlement, resources, trade and geopolitical relations.