📖 PART 1: Meaning of a Natural Region
A Natural Region is a large, continuous geographic area of the Earth that has a basic
uniformity of climate, natural vegetation, wildlife, and human activities. Climate is the most
important deciding factor.
The world is broadly divided into 3 major zones based on temperature: Torrid (Tropical)
Zone, Temperate Zone, and Frigid (Polar) Zone. These are
further subdivided into specific climatic regions.
🌴 PART 2: Equatorial Region
| Feature |
Details |
| Location |
Between 0° and 10° North and South of the Equator. Includes: Amazon Basin (South America), Congo
Basin (Africa), Indonesia, Malaysia, Singapore. |
| Climate |
Hot and wet throughout the year. Uniform temperature (~27°C avg) with no
separate winter season. Very low annual range of temperature. Heavy convectional
rainfall almost every afternoon (~200-250 cm/year). High humidity. |
| Natural Vegetation |
Tropical Rain Forests (Selvas). Dense, multi-layered evergreen forests. Trees
are very tall with broad leaves forming a thick canopy. Little sunlight reaches the ground.
Creepers, lianas, epiphytes (orchids) are common. Valuable hardwood trees: Mahogany, Ebony,
Rubber, Rosewood, Cinchona. |
| Wildlife |
Tree-dwellers (monkeys, sloths), colorful birds (macaws, toucans), reptiles (snakes, pythons,
crocodiles), wide variety of insects (tsetse fly). Very few large land mammals. |
| Human Life |
Harsh climate unsuited for dense population. Primitive tribes: Pygmies (Congo Basin), Amazon
Indians. Occupations: Hunting, food gathering, shifting agriculture, and plantation agriculture
(rubber in Malaysia, cocoa in Africa). |
☀️ PART 3: Tropical Monsoon & Tropical Desert Regions
1. Tropical Monsoon Region
- Location: 10° to 30° North and South on eastern margins of continents. India, Pakistan,
Bangladesh, Myanmar, Southeast Asia, Northern Australia.
- Climate: Distinct seasons — hot dry summer, warm wet rainy season (monsoon), cool dry
winter. Reversal of winds. Mean summer temp: 27-32°C. Mean winter temp: 15-25°C. Rain occurs mostly in
summer (150-200 cm).
- Vegetation: Tropical Deciduous Forests (trees shed leaves in the dry season to conserve
water). Sal, Teak, Sandalwood, Bamboo.
- Human Life: Highly populated. Intensive agriculture — mainly rice, wheat, sugarcane,
jute, tea.
2. Tropical Desert Region (Hot Deserts)
- Location: 15° to 30° North and South on western margins of continents (due to dry
offshore trade winds). Sahara, Arabian, Thar, Atacama, Kalahari, Great Australian Desert.
- Climate: Extremely high day temperatures (up to 50°C); cold nights (below 10°C).
Highest diurnal range of temperature. Negligible rainfall (less than 25 cm/year).
- Vegetation: Xerophytic (drought-resistant). Cactus, thorny bushes, acacia, date palms
(near oases). Long tap roots, thick fleshy stems, waxy small leaves or thorns.
- Human Life: Very low population. Nomadic herding (Bedouins in Arabia, Bushmen in
Kalahari). Agriculture only near oases. Mining is important (oil in Middle East).
🍇 PART 4: Mediterranean Region
The Mediterranean region is unique because of its Dry, warm summers and Mild, wet
winters. (Most other regions get rain in summer).
- Location: 30° to 45° North and South on western margins of continents. Lands around the
Mediterranean Sea (Italy, Spain, Greece), California (USA), Central Chile, Cape Town (South Africa),
Southern Australia.
- Climate: Summer: 20-25°C, under dry offshore Trade Winds. Winter: 5-10°C, under
moisture-bearing Westerlies bringing cyclonic rain. Moderate rainfall (40-65 cm). High amount of
sunshine.
- Vegetation: Trees adapted to survive summer drought. Olive, cork oak, laurel, cedar.
Deep roots, thick bark, small waxy leaves.
- Human Life: Very pleasant climate; "Winter resort of the world." Historically the
cradle of Western civilisation. World famous for Orchard farming (citrus fruits:
oranges, lemons, grapes) and Viticulture (wine making).
🌾 PART 5: Temperate Grasslands
| Region |
Local Name |
Characteristics |
| North America |
Prairies |
"Granaries of the World." Extensive mechanised wheat farming. |
| South America |
Pampas (Argentina) |
Beef and cattle rearing; alfalfa grass. |
| Eurasia |
Steppes (Russia/Ukraine) |
Flat, treeless plains. Very cold winters, short hot summers; low rain. |
| South Africa |
Veldts |
Sheep rearing (Merino wool). |
| Australia |
Downs |
Sheep and cattle farming. |
🧊 PART 6: Tundra Region (Cold Desert)
- Location: Beyond 65° North latitude (Arctic circle). Northern parts of Canada, Alaska,
Greenland, Northern Russia (Siberia). (Almost none in Southern Hemisphere except Antarctica).
- Climate: Extremely cold, long, severe winter (9-10 months); short, cool summer (2-3
months). Land is frozen most of the year (Permafrost). Precipitation is mostly snow.
- Vegetation: No trees can grow. Only mosses, lichens, and short flowering plants burst
into bloom during the brief summer thaw.
- Wildlife: Animals with thick fur/blubber. Polar bear, reindeer/caribou, Arctic fox,
walrus, seal, penguins (only in Antarctica).
- Human Life: Very sparse. Indigenous people (Inuits / Eskimos in North America, Lapps in
Scandinavia, Samoyeds in Siberia). Traditionally hunters/fishers; now use motor snow-scooters and
rifles.
📌 Chapter Summary
- Equatorial (0°-10°): Hot & wet all year; no winter; Amazon/Congo; evergreen
rainforests (Mahogany, Rubber); Pygmies.
- Tropical Monsoon (10°-30° East): Wet summer/dry winter; India/SE Asia; deciduous
forests (Teak, Sal); rice/wheat farming.
- Hot Desert (15°-30° West): Extremely hot/dry; Sahara/Thar; cactus (xerophytes);
nomads (Bedouins).
- Mediterranean (30°-45° West): Dry warm summer, WET mild winter; California/S.
Europe; olives/grapes; world's orchard (wine).
- Temperate Grasslands: Prairies (USA), Pampas (Arg), Steppes (Eurasia), Veldts (SA),
Downs (Aus); mechanised wheat, cattle.
- Tundra (>65°N): Severely cold, permafrost; mosses/lichens; reindeer, polar bear;
Inuits/Eskimos.