World Geography – RRB JE Study Notes
(General Awareness & Current Affairs)
1. Simple Explanation
World geography is the study of the Earth’s physical features (continents, oceans, rivers, mountains, climate zones) and its human elements (countries, capitals, population, economy, culture). For the RRB Junior Engineer exam, you only need the facts that appear frequently on competitive exams:
- Continents & Oceans – names, order, and basic facts.
- Major Countries – by area, population, and major capitals.
- Key Physical Features – longest rivers, highest mountains, largest deserts, etc.
- Time Zones & Climate Zones – a quick understanding of how the world is divided.
- Current‑Affair Highlights – recent geopolitical changes, economic rankings, and environment news that matter for the exam.
2. Key Points
| Category | Key Facts (RRB JE relevance) |
|---|---|
| Continents | 1. Asia – largest continent, 2. Africa – second largest, 3. North America – third, 4. South America, 5. Antarctica, 6. Europe, 7. Australia (Oceania). |
| Oceans | 1. Pacific – largest, 2. Atlantic, 3. Indian, 4. Southern, 5. Arctic. |
| Largest Countries (by area) | 1. Russia (17 098 242 km²) 2. Canada (9 984 670 km²) 3. China (9 597 000 km²) 4. United States (9 525 067 km²) 5. Brazil (8 515 767 km²). |
| Largest Countries (by population) | 1. China (≈ 1.41 billion) 2. India (≈ 1.40 billion) 3. United States (≈ 331 million) 4. Indonesia (≈ 273 million) 5. Pakistan (≈ 240 million). |
| Capital Cities | - Asia – Beijing, Tokyo, Delhi, Seoul, Jakarta. - Africa – Cairo, Nairobi, Addis‑Ababa, Pretoria (administrative), Rabat. - Europe – London, Paris, Berlin, Moscow, Rome. - North America – Washington D.C., Mexico City, Havana. - South America – Brasília, Buenos Aires, Lima, Santiago. |
| Major Rivers | 1. Amazon – longest in the world (≈ 7 062 km). 2. Nile – longest (≈ 6 650 km). 3. Yangtze – longest in Asia. 4. Mississippi‑Missouri – longest in the Americas. |
| Mountains & Ranges | 1. Mount Everest – highest peak (8 848 m), 2. K2, 3. Kangchenjunga (Asia), 4. Rocky Mountains (North America), 5. Andes (South America). |
| Deserts | 1. Sahara – largest hot desert, 2. Arabian (largest in the Middle East), 3. Gobi (Asia), 4. Kalahari. |
| Climate Zones | 1. Tropical – near equator (rainforest, savanna). 2. Dry – deserts (Sahara, Arabian). 3. Temperate – middle latitudes (Europe, North America). 4. Cold – polar (Arctic, Antarctic). |
| Time Zones | 24 standard zones (UTC±0 to ±12). India – UTC+5:30. |
| Economic Regions | 1. OECD – 38 countries. 2. BRICS – Brazil, Russia, India, China, South Africa. 3. EU – 27 member states. |
| Current‑Affair Highlights (2024) | • India: Ranked 7th largest country by area; 3rd largest by population. • Russia–Ukraine: Ongoing conflict affecting Eastern European geography. • Climate Agreements: COP 29 in 2024 – focus on Arctic warming. • Economic: China’s Belt‑and‑Road Initiative spanning 70+ countries. |
3. Worked Example
Problem – Calculate the approximate great‑circle distance between New Delhi (28.6139° N, 77.2090° E) and Mumbai (19.0760° N, 72.8777° E) using the haversine formula.