An original, topic-wise study digest of G.C. Leong's Certificate Physical and Human Geography, a standard reference that complements the NCERTs. This paraphrases the structure and ideas for CAPF revision and does not reproduce the book's text. Use it after the NCERT physical-geography base in ncert physical geography digest. Source policy: sources index.
Leong's strength is the clear treatment of climate types and natural regions: knowing each region's location, climate, vegetation, and characteristic life is high-yield for CAPF one-liners and match-the-following items.
- The Earth in the solar system; rotation (causes day and night, the apparent movement of the Sun) and revolution (causes seasons, with the tilt of the axis at 23.5°).
- Latitudes and longitudes: the equator (0°), Tropics of Cancer and Capricorn, Arctic and Antarctic circles; longitude and time, with 15° equal to one hour, and the International Date Line near 180°.
- Eclipses: solar (new moon, Moon between Sun and Earth) and lunar (full moon, Earth between Sun and Moon).
- Rock types (igneous, sedimentary, metamorphic) and the rock cycle, mirroring ncert physical geography digest.
- Earth movements: folding (creates fold mountains such as the Himalayas, Alps, Andes, Rockies), faulting (creates block mountains/horst such as the Vosges and rift valleys/graben such as the East African Rift), and the resulting major landforms.
- Vulcanicity: volcanoes (active, dormant, extinct), intrusive features (batholith, laccolith, sill, dyke) and extrusive features (lava plateaus). Earthquakes and the Pacific "Ring of Fire".
Leong treats each agent of erosion and deposition and its characteristic landforms:
- Rivers: youthful stage (V-valleys, waterfalls, rapids), mature stage (meanders), old stage (flood plains, ox-bow lakes, deltas). The river's profile of equilibrium.
- Underground water: karst/limestone features (clints and grikes, swallow holes, caverns, stalactites and stalagmites).
- Glaciation: cirques, aretes, pyramidal peaks, U-shaped valleys, hanging valleys, fjords, moraines, drumlins and eskers.
- Arid (wind): rock pedestals, yardangs, deflation hollows, dunes (barchan, seif), loess.
- Marine (waves): headlands and bays, cliffs, wave-cut platforms, caves, arches, stacks, beaches, spits and bars.
- Elements of weather: temperature, pressure, winds, humidity and precipitation, and the instruments that measure them.
- Atmospheric pressure belts and planetary wind systems (trade winds, westerlies, polar easterlies), modified by the seasonal monsoon.
- Rainfall types: convectional, orographic (relief) and cyclonic.
- Ocean currents and their effect on coastal climates (warm currents like the Gulf Stream and the North Atlantic Drift warm Western Europe; cold currents like the Labrador and Benguela cool adjacent coasts and aid fog and fishing).
This is the most examinable part of Leong. Each natural region has a defining latitude/location, climate, vegetation and human/economic life. Learn them as a table.
- Equatorial (tropical rainforest): near the equator (Amazon, Congo, Indonesia). Hot and wet all year, double rainfall maxima, dense evergreen forest (hardwoods such as mahogany, ebony), shifting cultivation.
- Tropical monsoon and tropical marine: South and South-east Asia. A marked wet (summer monsoon) and dry season; rice cultivation; deciduous forest (teak, sal).
- Savanna (tropical grassland): between the rainforest and the hot desert (East Africa, Llanos, Campos). Tall grasses with scattered trees, big game, distinct wet and dry seasons.
- Hot desert: Sahara, Arabian, Thar, Atacama, Kalahari, Australian deserts, on the western sides of continents in the trade-wind belt. Extreme aridity, scanty xerophytic vegetation, nomadic herding and oasis farming.
- Mediterranean (warm temperate western margin): around the Mediterranean Sea, California, central Chile, the Cape (South Africa) and south-west/south Australia. Hot dry summers and mild wet winters (winter westerly rain); citrus fruit, vines and olives; the classic "fruit and wine" region.
- China type (warm temperate eastern margin): south-east USA, central China, the Natal coast. Warm wet summers, cooler drier winters; intensive farming.
- Steppe (temperate grassland): the Prairies, Pampas, Veld, Downs and the Eurasian Steppe, in continental interiors. Short grasses; the world's great wheat belts and cattle/sheep ranching.
- British type (cool temperate western margin): north-west Europe, British Columbia, southern Chile, New Zealand. Mild winters and cool summers, rain all year from westerlies; mixed farming, dairying and industry.
- Laurentian type (cool temperate eastern margin): north-east North America and East Asia. Cold winters, warm summers; fishing (the Grand Banks), lumbering.
- Cold temperate/Taiga (coniferous forest): a broad northern belt across Canada and Eurasia. Long cold winters; coniferous softwood forest (pine, spruce, fir); lumbering, pulp and paper.
- Tundra (Arctic): northern fringes of North America and Eurasia. Very cold, mosses and lichens, no trees, frozen subsoil (permafrost); herding (reindeer) and hunting by the Inuit and similar peoples.
- Population: distribution, density, growth and migration; factors favouring dense settlement (fertile plains, mild climate, water, minerals).
- Types of farming worldwide: shifting cultivation, intensive subsistence (Asian rice), commercial grain (wheat belts), plantation agriculture (tea, rubber, coffee), dairy and mixed farming, nomadic herding and Mediterranean agriculture.
- Mineral, power and manufacturing geography: location of major coal, iron and oil fields; great industrial regions of the world; world trade and transport routes.
- Natural region match-ups: a region to its climate, its typical vegetation, or its characteristic crop (Mediterranean to citrus/olive/vine; savanna to tall grass; taiga to coniferous softwood).
- Location: which continents have hot deserts on their western margins; where the Prairies, Pampas and Steppe lie.
- Ocean currents: which current warms Western Europe (the North Atlantic Drift/Gulf Stream), which cold current aids the Grand Banks fishery (the Labrador Current).
- Landform agents: glacial versus fluvial versus aeolian landforms.
- The Mediterranean climate is found on the western margins of continents in which latitude belt, and what is its rainfall season? (Answer: warm temperate latitudes, roughly 30 to 40°; winter rainfall from the westerlies.) Authored practice, not a verbatim PYQ.
- Which natural region is characterised by coniferous softwood forests and a long cold winter across a broad northern belt? (Answer: the cold temperate/Taiga coniferous-forest region.) Authored practice, not a verbatim PYQ.