World Geography – Study Notes for M.P. Police Sub‑Inspector (SI) Exam
(Intended for IIT‑JEE/Competitive exam style: depth, derivations, key formulae, tricky points, and a hard practice question)
1. Overview
| Item | Key Points | Typical Exam Focus |
|---|---|---|
| Continents | 7 (Asia, Africa, North America, South America, Antarctica, Europe, Australia) | Area rankings, unique features |
| Oceans | 5 (Pacific, Atlantic, Indian, Southern, Arctic) | Depths, boundaries, major seas |
| Countries | 195 (193 UN + 2 observer states) | Capitals, area, population, borders |
| Climatic Zones | Tropical, Sub‑tropical, Temperate, Continental, Polar | Monsoon, arid, desert, tundra |
| Geopolitical Issues | Borders, enclaves, exclaves, disputed territories | Russia‑Ukraine, Kashmir, Eritrea‑Ethiopia |
| Current Affairs | New country names, boundary changes, climate events | 2024–2025 updates |
2. Continents – Area & Population
| Rank | Continent | Area (km²) | Population (2024 est.) | Population Density (people/km²) |
|---|---|---|---|---|
| 1 | Asia | 44,579,000 | 4.7 billion | 105 |
| 2 | Africa | 30,370,000 | 1.4 billion | 46 |
| 3 | North America | 24,709,000 | 592 million | 24 |
| 4 | South America | 17,840,000 | 430 million | 24 |
| 5 | Antarctica | 14,200,000 | < 1,000 (researchers) | 0 |
| 6 | Europe | 10,180,000 | 748 million | 73 |
| 7 | Oceania | 8,526,000 | 42 million | 5 |
Tricky Point – Oceania is often subdivided into Australia, New Zealand, Melanesia, Micronesia, Polynesia. When asked “largest continent” students must pick Asia, not Australia.
3. Major Oceans & Seas
| Ocean | Approx. Area (km²) | Notable Features |
|---|---|---|
| Pacific | 165,200,000 | Deepest trench (Mariana) |
| Atlantic | 106,400,000 | Equatorial Atlantic, Gulf of Mexico |
| Indian | 73,000,000 | Warmest ocean, Indian Ocean Ridge |
| Southern | 71,200,000 | Bounded by Antarctic Circumpolar Current |
| Arctic | 14,056,000 | Ice‑covered, small sea area |
| Sea | Location | Key Countries |
|---|---|---|
| Mediterranean | Between Europe, Africa, Asia | Spain, Italy, Greece, Turkey |
| Caribbean | West of Central America | Cuba, Jamaica, Puerto Rico |
| Red Sea | Between Africa & Arabian Peninsula | Egypt, Saudi Arabia |
| Black Sea | Between Europe & Asia | Russia, Turkey, Georgia |
Tricky Point – The Red Sea is not a part of the Indian Ocean (though it connects to it through the Bab‑Al‑Mandab Strait).
4. Countries & Capitals – Quick Reference
| Rank | Country | Capital | Area (km²) | Population (2024 est.) |
|---|---|---|---|---|
| 1 | Russia | Moscow | 17,098,242 | 144 million |
| 2 | Canada | Ottawa | 9,984,670 | 38 million |
| 3 | China | Beijing | 9,597,000 | 1.412 billion |
| 4 | United States | Washington, D.C. | 9,525,067 | 332 million |
| 5 | Brazil | Brasília | 8,515,767 | 215 million |
| … | … | … | … | … |
Tricky Points
- South Africa has three capitals: Pretoria (administrative), Bloemfontein (judicial), Cape Town (legislative).
- India has New Delhi (capital), but its official capital is Delhi; Mumbai is the commercial capital.
- Kazakhstan has Nur‑Sultan (formerly Astana) – renamed in 2019, still called Astana in many sources.
5. Borders & Geopolitical Issues
| Issue | Countries Involved | Key Facts |
|---|---|---|
| Enclaves & Exclaves | India–Bangladesh: Khulna (India) inside Bangladesh. | 5 enclaves in India, 3 in Bangladesh. |
| Disputed Territories | *Kashmir |