7.1 World Geography, Continents, Capitals, Currencies & Strategic Straits

7.1 World Geography, Continents, Capitals, Currencies & Strategic Straits

Core Principle: Academic General Knowledge at the Army Selection & Recruitment Centre (AS&RC) evaluates precise mental cartography. Candidates must master continental landmasses, oceanic trenches, vital maritime chokepoints, sovereign capitals, national currencies, and world geographical superlatives without confusing closely related physical features or political boundaries.

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The Continents and Oceans of the World

Earth's total surface area encompasses approximately 510.1 million square kilometers, of which roughly 71% (361 million km²) is covered by water and 29% (149 million km²) consists of continental landmasses and islands.

                               THE SEVEN CONTINENTS
                                        |
  +------------+------------+-----------+-----------+-----------+------------+
  |            |            |           |           |           |            |
1. ASIA      2. AFRICA    3. NORTH    4. SOUTH    5. ANT-     6. EUROPE    7. AUSTRALIA
(44.58M km²) (30.37M km²)   AMERICA     AMERICA     ARCTICA     (10.18M km²)  / OCEANIA
                          (24.71M km²)(17.84M km²)(14.20M km²)              (8.60M km²)

The Seven Continents Ranked by Area

1. Asia (~44.58 million km² | ~30% of total land area): The largest and most populous continent, hosting approximately 60% of the human population (~4.7 billion people). It contains both the highest point on Earth (Mount Everest / Sagarmatha / Qomolangma: 8,848.86 m in the Himalayas on the Nepal-China border) and the lowest exposed land depression (Dead Sea Shoreline: -430 m on the Jordan-Israel/Palestine border).
2. Africa (~30.37 million km² | ~20.4% of land area): The second-largest continent, comprising 54 sovereign nations. Straddles the equator, bounded by the Mediterranean Sea to the north, the Red Sea and Indian Ocean to the east, and the Atlantic Ocean to the west. Highest peak: Mount Kilimanjaro (5,895 m) in Tanzania. Contains the Sahara, the world's largest hot desert, and the Nile, the world's longest river.
3. North America (~24.71 million km² | ~16.5% of land area): Extends from the Arctic circle to the Isthmus of Panama. Highest peak: Denali (Mount McKinley: 6,190 m) in Alaska, USA. Lowest point: Death Valley (Badwater Basin: -86 m) in California, USA.
4. South America (~17.84 million km² | ~12.0% of land area): Dominating the southern Western Hemisphere, connected to North America via Panama. Contains the Andes mountain range (longest continental mountain chain in the world, ~7,000 km). Highest peak: Mount Aconcagua (6,961 m) in Argentina. Hosts the Amazon River basin, the world's largest drainage basin and rainforest.
5. Antarctica (~14.20 million km² | ~9.6% of land area): The fifth-largest continent, completely surrounded by the Southern Ocean. Over 98% of its territory is capped by permanent continental ice sheets averaging 1.9 km in thickness. It is the coldest, windiest, and driest continent, classified scientifically as the world's largest desert. Highest point: Vinson Massif (4,892 m) in the Sentinel Range.
6. Europe (~10.18 million km² | ~6.8% of land area): Separated from Asia by the Ural Mountains, Ural River, Caspian Sea, Greater Caucasus range, and Black Sea. Highest peak: Mount Elbrus (5,642 m) in the Caucasus Mountains of Russia (Mont Blanc at 4,809 m is the highest peak in the Western European Alps).
7. Australia / Oceania (~8.60 million km² | ~5.8% of land area): The smallest continent, often categorized with Pacific island territories as Oceania. Known as the "Island Continent." Lowest and driest inhabited continent. Highest peak on the Australian mainland: Mount Kosciuszko (2,228 m); highest peak in Oceania: Puncak Jaya (Carstensz Pyramid: 4,884 m) in Indonesian Papua.

The Five Oceans Ranked by Area and Depth

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Strategic Maritime Straits, Canals, and Chokepoints

Maritime chokepoints are narrow natural straits or constructed canals that funnel high volumes of commercial shipping and naval power. In PMA academic screening, questions routinely assess which bodies of water are joined and which landmasses are separated.

                                    [ BLACK SEA ]
                                          |
                                   Bosphorus Strait
                                          |
                                          v
                                  [ SEA OF MARMARA ]
                                          |
                                  Dardanelles Strait
                                          |
                                          v
[ ATLANTIC OCEAN ] <=== Strait of Gibraltar ===> [ MEDITERRANEAN SEA ]
                                                         |
                                                     Suez Canal
                                                         |
                                                         v
                                                    [ RED SEA ]
                                                         |
                                                   Bab-el-Mandeb
                                                         |
                                                         v
                                                  [ GULF OF ADEN ]
                                                         |
                                                         v
[ PERSIAN GULF ] === Strait of Hormuz ===> [ GULF OF OMAN / INDIAN OCEAN ]

Strategic Straits Directory

1. Strait of Hormuz:

   • Waterways Connected: Persian Gulf with the Gulf of Oman (and onwards into the Arabian Sea / Indian Ocean).
   • Landmasses Separated: Iran (to the north) from Oman (Musandam Peninsula enclave) and the United Arab Emirates (to the south).
   • Strategic Importance: The world's most critical petroleum transit chokepoint. A major share of globally traded petroleum flows through this narrow waterway, carrying exports from Saudi Arabia, Iraq, UAE, Kuwait, Qatar (LNG), and Iran.

2. Strait of Malacca:

   • Waterways Connected: Andaman Sea (Indian Ocean) with the South China Sea (Pacific Ocean).
   • Landmasses Separated: Malay Peninsula (Peninsular Malaysia and Singapore) to the northeast from the Indonesian island of Sumatra to the southwest.
   • Strategic Importance: The main maritime corridor connecting the Indian Ocean to East Asia (China, Japan, South Korea, Taiwan). A very large volume of shipping and energy trade passes through it.

3. Bab-el-Mandeb ("Gate of Tears"):

   • Waterways Connected: Red Sea with the Gulf of Aden (and onwards into the Arabian Sea / Indian Ocean).
   • Landmasses Separated: Arabian Peninsula (Yemen) to the northeast from the Horn of Africa (Djibouti and Eritrea) to the southwest.
   • Strategic Importance: Forms the southern maritime gateway to the Suez Canal. All container traffic moving between Europe/Mediterranean and Asia/East Africa via the Red Sea must transit this bottleneck.

4. Bosphorus Strait (Istanbul Strait):

   • Waterways Connected: Black Sea with the Sea of Marmara.
   • Landmasses Separated: European Turkey (Thrace) from Asian Turkey (Anatolia), bisecting the city of Istanbul.
   • Strategic Importance: The world's narrowest strait used for international navigation (minimum width ~700 meters). Regulated by the Montreux Convention of 1936, which governs the transit of civilian merchant vessels and naval warships into the Black Sea.

5. Dardanelles Strait (Hellespont):

   • Waterways Connected: Sea of Marmara with the Aegean Sea (Mediterranean basin).
   • Landmasses Separated: Gallipoli Peninsula in European Turkey from northwestern Anatolia in Asian Turkey.
   • Historical Importance: Site of the 1915 Gallipoli Campaign during World War I, where Ottoman forces mounted a legendary defense against Allied naval and amphibious landings.

6. Strait of Gibraltar:

   • Waterways Connected: Atlantic Ocean with the Mediterranean Sea.
   • Landmasses Separated: Iberian Peninsula of Europe (Spain and the British Overseas Territory of Gibraltar) from North Africa (Morocco and the Spanish exclave of Ceuta).
   • Key Feature: Flanked by the legendary "Pillars of Hercules" (the Rock of Gibraltar to the north and Jebel Musa / Mount Hacho to the south); narrowest width is approximately 14.3 kilometers (8.9 miles).

7. Palk Strait:

   • Waterways: Palk Strait opens toward the Bay of Bengal through Palk Bay; the shallow Adam's Bridge chain separates Palk Bay from the Gulf of Mannar.
   • Landmasses Separated: Tamil Nadu state of southeastern India from the Jaffna District of northern Sri Lanka.
   • Key Feature: The shallow Adam's Bridge (Rama Setu) chain lies between Pamban Island and Mannar Island.

8. Strait of Dover:

   • Waterways Connected: English Channel with the North Sea.
   • Landmasses Separated: Great Britain (Dover, England) from continental Europe (Calais, France).
   • Key Feature: Narrowest section of the English Channel (~33.3 km). Underlain by the underwater Channel Tunnel (Chunnel) opened in 1994.

9. Bering Strait:

   • Waterways Connected: Chukchi Sea (Arctic Ocean) with the Bering Sea (Pacific Ocean).
   • Landmasses Separated: Chukotka Peninsula of Russia (Asia) from the Seward Peninsula of Alaska (North America); narrowest width ~82 km.
   • Key Feature: The International Date Line passes between the two Diomede Islands (Big Diomede belonging to Russia, Little Diomede belonging to the United States), which sit only 3.8 km apart.

Strategic International Canals

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High-Yield World Capitals and National Currencies

PMA Academic general knowledge tests place significant emphasis on regional sovereign capitals and legal tenders, particularly for Pakistan's immediate neighborhood, Central Asian Republics (CARs), Middle East powers, and permanent members of the UN Security Council.

Comprehensive Regional Reference Table

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Global Geographical Superlatives

The AS&RC Academic Test questions on physical geography frequently test extreme dimensions, longest waterways, and deepest depressions across the globe.

Topographical Superlatives Reference Matrix

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Worked Exam Scenarios & Trap Analysis

Scenario 1: Resolving Desert Classifications Under Time Pressure

• Question Stem: "Which of the following is the largest desert on Earth?"
• Options: (A) Sahara, (B) Arabian, (C) Antarctica, (D) Gobi.
• Tactical Breakdown: A frequent error among candidates is immediately selecting "Sahara". Scientifically, a desert is defined strictly by precipitation levels (receiving under 250 mm / 10 inches of rain or snow per year), regardless of surface temperature. Antarctica spans 14.2 million km² with near-zero precipitation, making it the largest desert on the planet. Sahara is only the correct answer if the question explicitly specifies "largest hot desert" or "largest subtropical desert".

Scenario 2: Freshwater Lakes — Surface Area vs. Hydrological Volume

• Scenario Comparison:
  • Largest freshwater lake by surface area: Lake Superior (82,100 km²).
  • Largest freshwater lake by volume / Deepest lake: Lake Baikal (1,642 m deep; ~23,600 km³ of water).
  • Largest inland body of water overall: Caspian Sea (371,000 km²; saline endorheic lake).