Ch 1
World Population and Human Development
Key Definitions
Population Density: Number of persons per unit area. = Population / Area (in km²).
Human Development Index (HDI): Composite index of life expectancy, education (mean and expected years of schooling), and GNI per capita.
Demographic Transition Theory (DTT): Model describing population change through 4 stages as a country develops economically.
Key Points to Remember
- →World population (2024): ~8.1 billion. 90% live in the northern hemisphere.
- →Densely populated regions: South Asia (India, Bangladesh), East Asia (China, Japan), Northwest Europe.
- →Sparsely populated: Sahara desert, Amazon rainforest, Arctic, Antarctica.
- →DTT stages: Stage 1 — high BR + high DR (low growth), Stage 2 — high BR + falling DR (population explosion), Stage 3 — falling BR + low DR, Stage 4 — low BR + low DR.
- →India is in Stage 3 (declining birth rate, low death rate).
- →HDI components: Life expectancy at birth + Education index (mean + expected years) + GNI per capita (PPP).
- →HDI range: 0 to 1. Very high (≥0.800), High (0.700–0.799), Medium (0.550–0.699), Low (<0.550).
- →India's HDI rank: medium human development category.
Formulas & Equations
Population density = Total population / Area
Natural growth rate = Crude Birth Rate − Crude Death Rate
HDI = (Life Expectancy Index + Education Index + GNI Index) / 3
Exam Tips
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Age-sex pyramids: draw and label — expansive (young population, high BR/DR), stationary (stable), constrictive (ageing population, low BR).
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Sex ratio = females per 1000 males. India's sex ratio is below 1000.
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HDI is NOT the same as per capita income — it includes education and health too.
Ch 2
Primary Activities
Key Definitions
Shifting Cultivation: Moving agriculture: clear land by burning, cultivate for 2-3 years, then move on. Known as Jhum (NE India), Milpa (Mexico), Ladang (SE Asia), Taungya (Myanmar).
Plantation Agriculture: Large-scale commercial farming of single crop (tea, coffee, rubber). Capital-intensive, uses hired labour.
Extensive Commercial Agriculture: Large farms, low labour per unit area, high mechanisation. Found in USA (wheat belt), Canada, Australia.
Key Points to Remember
- →Gathering: most primitive. Amazon, Congo forests — tribal people gather fruits, roots, honey. Low commercial value.
- →Pastoral nomadism: seasonal movement with livestock. Bedouins (Arabia), Maasai (East Africa), Gujjars (India).
- →Types of agriculture — Subsistence: for family use, low surplus. Commercial: for market, profit-oriented.
- →Intensive subsistence (wet rice dominant): high labour, small plots. South/Southeast/East Asia.
- →Plantation: monoculture, export-oriented. Tea (India, Sri Lanka), rubber (Malaysia), coffee (Brazil), cocoa (West Africa).
- →Extensive commercial: temperate grasslands. Wheat and corn farming with mechanisation. Canada, USA, Argentina, Australia.
- →Mixed farming: crops + livestock together. Common in Europe and USA.
- →Mediterranean agriculture: cereals + vines + fruits + olives. Around Mediterranean Sea, California, South Africa.
Exam Tips
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Map question: mark wheat belt (USA Great Plains), cotton belt (USA south), rice regions (South/East Asia).
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Plantation agriculture key characteristics: monoculture, capital-intensive, export-oriented, tropical/subtropical.
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Know shifting cultivation names for different regions — frequently asked in MCQs.
Ch 3
Transport and International Trade
Key Definitions
Transcontinental Railway: A railway line crossing an entire continent. Examples: Trans-Siberian (Russia), Trans-Canadian, Orient Express.
Comparative Advantage: A country's ability to produce a good at lower opportunity cost than others. Forms the basis of international trade (Ricardo).
Balance of Trade: Difference between exports and imports of goods. Surplus = exports > imports.
Key Points to Remember
- →Land transport: roads (flexible, door-to-door) vs railways (bulk, long distance, cheaper per ton-km).
- →Trans-Siberian Railway: Moscow to Vladivostok (9,289 km) — longest single railway in the world. Connects European Russia to Pacific coast.
- →Orient Express: Paris to Istanbul — historically important for Europe-Asia connectivity.
- →Sea routes: North Atlantic route (busiest), Cape of Good Hope route (alternative to Suez), Pan-Pacific route.
- →Suez Canal: shortens sea journey from Europe to India by 7,000 km.
- →Panama Canal: connects Atlantic and Pacific Ocean — shortens shipping routes for US west and east coast trade.
- →Air transport: fastest, most expensive, suitable for perishables, high-value, emergency goods.
- →WTO (World Trade Organisation) — established 1995, replaced GATT. Governs trade rules between nations.
- →Major trading blocs: EU, NAFTA/USMCA (North America), ASEAN, SAARC (South Asia).
- →India's exports: petroleum products, gems and jewellery, engineering goods. Imports: crude oil, gold, electronics, coal.
Exam Tips
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Suez Canal vs Cape route: Suez = shorter, faster, toll required. Cape = longer, no toll, safer in war.
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WTO MCQs: established 1995, based in Geneva, replaced GATT (1947).
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Pipeline transport: best for oil, gas, water — continuous flow, low cost, underground.
Ch 4
India — Land, Water and Agriculture
Key Definitions
Net Sown Area: Land area sown at least once in the agricultural year. India's net sown area = about 140 million hectares.
Green Revolution: Technological transformation of Indian agriculture from late 1960s using HYV seeds, fertilisers, and irrigation. Led to self-sufficiency in foodgrains.
Multipurpose River Valley Project: A dam project serving multiple purposes: irrigation, hydro-electricity, flood control, navigation, fisheries, recreation.
Key Points to Remember
- →Land use categories in India: Forest land, Land not available for cultivation (roads, buildings), Fallow land (rested), Net sown area.
- →Major food crops: Rice (West Bengal, Andhra Pradesh, Tamil Nadu, Odisha, Punjab), Wheat (Punjab, Haryana, UP, Bihar), Millets (Rajasthan, Maharashtra, Karnataka).
- →Major commercial crops: Cotton (Maharashtra, Gujarat, Haryana), Jute (West Bengal, Assam), Sugarcane (UP, Maharashtra), Tea (Assam, West Bengal, Himachal Pradesh).
- →Green Revolution: HYV seeds for wheat and rice, irrigation expansion, chemical fertilisers. Success in Punjab, Haryana, western UP. NOT successful in eastern India initially.
- →Problems with Indian agriculture: fragmented land holdings, low irrigation coverage, dependence on monsoon, poor market access.
- →Irrigation types: Canal (canal systems in Punjab, Haryana, UP), Well/tube well (Ganga plains), Tank (south India — Andhra, Tamil Nadu).
- →Major projects: Bhakra Nangal (Sutlej, Punjab-Himachal), Hirakud (Mahanadi, Odisha), Damodar Valley (Damodar, Jharkhand-WB), Sardar Sarovar (Narmada, Gujarat).
- →Traditional water conservation: Johads (Rajasthan, earthen check dams), Baoli (step wells), Kunds (underground tanks, Rajasthan), Bamboo drip irrigation (Meghalaya).
Exam Tips
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Map question: mark major dams (Bhakra Nangal on Sutlej, Hirakud on Mahanadi, Sardar Sarovar on Narmada).
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Green Revolution criticism: regional inequality (only Punjab-Haryana), groundwater depletion, soil degradation, crop monoculture.
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Tank irrigation predominant in south India (peninsular rivers are non-perennial).
Ch 5
India — Population, Migration and Settlements
Key Definitions
Census: Official enumeration of population conducted every 10 years in India. Last completed census: 2011.
Demographic Dividend: Economic advantage when a country has a large working-age population relative to dependents.
Primate City: A city that is disproportionately large compared to the second largest city. Mumbai and Delhi are primate cities.
Key Points to Remember
- →India's population (2011 census): 1.21 billion. Density: 382 per km².
- →Most densely populated states: UP, Bihar, West Bengal. Least: Arunachal Pradesh, Mizoram, Sikkim.
- →Sex ratio: 943 females per 1000 males (2011). Kerala highest (1084). Haryana, Delhi lowest.
- →Literacy rate (2011): 74.04%. Males: 82.14%. Females: 65.46%. Kerala highest (94%).
- →Migration streams: Rural to urban (largest stream), Inter-state (MP, Rajasthan → Delhi, Maharashtra), International (Gulf countries, USA).
- →Rural-urban migration causes: poverty, drought, unemployment (push) vs employment, education, amenities (pull).
- →Rural settlements types: Compact (nucleated — north Indian plains), Semi-compact, Dispersed (hills, tribal areas).
- →Urban settlements by population: Town (<1 lakh), City (1–10 lakh), Metro (10+ lakh), Mega city (50+ lakh) — Mumbai, Delhi are mega cities.
- →Urbanisation rate in India: about 31% (2011). Growing rapidly.
Exam Tips
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Sex ratio MCQ: 940-950 females per 1000 males at national level. Kerala is highest, not lowest.
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Demographic dividend opportunity: India's median age is young (~28 years) — large working-age population in next 20 years.
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Map question: mark densely (Ganga plains) and sparsely (Himalayas, deserts) populated regions of India.