📑 Topics on this page (Jump to Topic):
📌 1. Continents
| Continent | Area rank | Key facts |
|---|---|---|
| Asia | 1 | Largest & most populous; highest peak Everest (8,849 m); lowest point Dead Sea |
| Africa | 2 | "Dark Continent"; most countries (54); crossed by Equator and both Tropics; Kilimanjaro |
| North America | 3 | Denali (Mt McKinley); Great Lakes |
| South America | 4 | Amazon; Andes (longest range); Aconcagua; Angel Falls (highest) |
| Antarctica | 5 | "White Continent"; coldest, driest, highest on average; Indian stations Maitri & Bharati |
| Europe | 6 | Elbrus (highest); Volga (longest river) |
| Australia (Oceania) | 7 | Smallest; "island continent"; Great Barrier Reef |
- Largest countries by area: Russia > Canada > USA/China > Brazil > Australia > India (7th). Smallest country Vatican City.
- Largest island Greenland (Denmark); largest archipelago country Indonesia.
📌 2. Major Rivers & Lakes
| River | Feature |
|---|---|
| Nile | Longest (≈ 6,650 km); from Lake Victoria to the Mediterranean; Egypt is "gift of the Nile"; Aswan Dam |
| Amazon | Largest by discharge and basin; crosses the Equator |
| Yangtze | Asia's longest; Three Gorges Dam (largest hydro plant) |
| Mississippi-Missouri | USA; "Old Man River" |
| Huang He | "Sorrow of China"; Yellow River |
| Congo (Zaire) | Crosses the Equator twice |
| Limpopo | Crosses the Tropic of Capricorn twice |
| Danube | Flows through the most countries (10) |
| Tigris-Euphrates | Mesopotamian civilisation (Iraq) |
- Lakes: largest — Caspian Sea (salt); largest freshwater — Superior (USA-Canada); deepest — Baikal (Russia); highest navigable — Titicaca (Peru-Bolivia).
- Waterfalls: highest — Angel (Venezuela); famous — Niagara (USA-Canada, between Erie and Ontario), Victoria (Zambezi river).
📌 3. Deserts & Grasslands
| Desert | Location |
|---|---|
| Sahara — largest hot desert | North Africa |
| Antarctica — largest (cold) desert | South Pole |
| Atacama — driest | Chile |
| Gobi | Mongolia-China (cold desert) |
| Kalahari, Namib | Southern Africa (Botswana, Namibia) |
| Great Victoria, Gibson | Australia |
| Thar | India-Pakistan |
| Rub al Khali ("Empty Quarter") | Saudi Arabia |
| Grassland | Location |
|---|---|
| Prairies | North America ("granary of the world") |
| Pampas | Argentina |
| Steppes | Eurasia (Russia, Kazakhstan) |
| Downs | Australia |
| Veld | South Africa |
| Savanna | Africa |
| Llanos | Venezuela-Colombia |
| Campos | Brazil |
| Canterbury | New Zealand |
📌 4. Straits & Canals
| Strait / Canal | Connects / separates |
|---|---|
| Gibraltar | Mediterranean-Atlantic; Spain-Morocco |
| Malacca | Andaman Sea-South China Sea; Malaysia-Sumatra |
| Palk Strait | India-Sri Lanka |
| Bering | Asia (Russia)-North America (Alaska) |
| Hormuz | Persian Gulf-Gulf of Oman; Iran-Oman (oil route) |
| Bosporus | Black Sea-Sea of Marmara; Istanbul |
| Dover | England-France |
| Bab-el-Mandeb | Red Sea-Gulf of Aden; Yemen-Djibouti |
| Suez Canal (1869) | Mediterranean-Red Sea (Egypt) |
| Panama Canal (1914) | Atlantic-Pacific (Panama) |
📌 5. Boundary Lines & Nicknames
| Line | Countries |
|---|---|
| Radcliffe Line | India-Pakistan (and India-Bangladesh) |
| McMahon Line | India-China |
| Durand Line | Pakistan-Afghanistan |
| 38th Parallel | North & South Korea |
| 49th Parallel | USA-Canada |
| Hindenburg Line | Germany-Poland |
| Maginot Line | France-Germany |
- Nicknames: Land of the Rising Sun — Japan; Land of a Thousand Lakes — Finland; Land of the Midnight Sun — Norway; Land of White Elephants — Thailand; Land of Kangaroos — Australia; Playground of Europe — Switzerland; Island of Cloves — Zanzibar.
⚠️ Exam Traps:
- Longest river is the Nile, but largest by discharge is the Amazon.
- The largest desert is Antarctica; the largest hot desert is the Sahara.
- McMahon = India-China; Durand = Pakistan-Afghanistan — do not swap.
- Caspian is the largest lake (salt); the largest freshwater lake is Superior.
📌 6. Practice MCQs
📝 Practice MCQs (prepared by SF Prep — not PYQs)
Q1. Which is the largest continent by area? Practice
Correct answer: (B)
Asia is ≈ 30% of Earth's land.
Asia is ≈ 30% of Earth's land.
Q2. Which continent is crossed by the Equator and both Tropics? Practice
Correct answer: (C)
Africa is the only continent crossed by all three lines.
Africa is the only continent crossed by all three lines.
Q3. Which is the longest river in the world? Practice
Correct answer: (D)
The Nile is ≈ 6,650 km long.
The Nile is ≈ 6,650 km long.
Q4. Which river crosses the Equator twice? Practice
Correct answer: (A)
The Congo crosses the Equator twice; the Limpopo crosses the Tropic of Capricorn.
The Congo crosses the Equator twice; the Limpopo crosses the Tropic of Capricorn.
Q5. Which river is called the "Sorrow of China"? Practice
Correct answer: (B)
Due to the devastating floods of the Huang He (Yellow River).
Due to the devastating floods of the Huang He (Yellow River).
Q6. Which is the largest hot desert in the world? Practice
Correct answer: (C)
The Sahara covers ≈ 9.2 million km² in North Africa.
The Sahara covers ≈ 9.2 million km² in North Africa.
Q7. The Atacama, the driest desert, is in — Practice
Correct answer: (D)
The Atacama lies in northern Chile, created by the cold Humboldt current.
The Atacama lies in northern Chile, created by the cold Humboldt current.
Q8. The "Pampas" grasslands are in — Practice
Correct answer: (A)
The Pampas are in Argentina (and Uruguay); the Veld is in South Africa.
The Pampas are in Argentina (and Uruguay); the Veld is in South Africa.
Q9. The "Steppes" are found in — Practice
Correct answer: (B)
The Steppes stretch from Ukraine to Mongolia.
The Steppes stretch from Ukraine to Mongolia.
Q10. Which strait separates India from Sri Lanka? Practice
Correct answer: (C)
The Palk Strait lies between Tamil Nadu and Sri Lanka.
The Palk Strait lies between Tamil Nadu and Sri Lanka.
Q11. The Strait of Gibraltar connects — Practice
Correct answer: (D)
It lies between Spain and Morocco.
It lies between Spain and Morocco.
Q12. The Bering Strait separates — Practice
Correct answer: (A)
The Bering lies between Russia (Siberia) and Alaska.
The Bering lies between Russia (Siberia) and Alaska.
Q13. The Suez Canal joins — Practice
Correct answer: (B)
Opened in 1869, the Suez shortens the Europe-Asia route.
Opened in 1869, the Suez shortens the Europe-Asia route.
Q14. The McMahon Line is the boundary between — Practice
Correct answer: (C)
Drawn at the 1914 Simla Convention; Arunachal Pradesh border.
Drawn at the 1914 Simla Convention; Arunachal Pradesh border.
Q15. The Durand Line lies between — Practice
Correct answer: (D)
Drawn by Mortimer Durand in 1893.
Drawn by Mortimer Durand in 1893.
Q16. Which is the deepest lake in the world? Practice
Correct answer: (A)
Lake Baikal in Siberia is ≈ 1,642 m deep.
Lake Baikal in Siberia is ≈ 1,642 m deep.
Q17. Which country is called the "Land of a Thousand Lakes"? Practice
Correct answer: (B)
Finland has thousands of glacial lakes.
Finland has thousands of glacial lakes.
Q18. India's rank in the world by area is — Practice
Correct answer: (C)
India, with ≈ 3.287 million km², is the 7th largest (≈ 2.4% of the world).
India, with ≈ 3.287 million km², is the 7th largest (≈ 2.4% of the world).
Q19. Which river flows through the most countries? Practice
Correct answer: (D)
The Danube flows through 10 countries into the Black Sea.
The Danube flows through 10 countries into the Black Sea.
Q20. The Strait of Hormuz lies between — Practice
Correct answer: (A)
Hormuz is the gateway to the Persian Gulf — a key oil route.
Hormuz is the gateway to the Persian Gulf — a key oil route.