Physical Features of India

Overview

Physical Features of India is a foundational topic in the Social Science section of OTET Paper II. It forms the geographical backbone for understanding India's climate, agriculture, natural resources, and human settlement patterns. Questions typically test your knowledge of mountain ranges, river systems, plains, plateaus, and climatic zones.

This topic connects directly with other syllabus areas like Natural Resources, Geography of Odisha, and Environment. Examiners frequently ask about the location of specific features, their formation, and their significance for Indian life and economy. Mastery requires a clear mental map of India's physical divisions and the ability to link geographical features with their consequences.

Expect 3–5 questions covering identification of mountain passes, river origins, plateau boundaries, and climate types. Map-based conceptual questions are common.

Key Concepts

• **Six Major Physical Divisions**: India is divided into the Northern Mountains, Northern Plains, Peninsular Plateau, Coastal Plains, Islands, and the Thar Desert. Each has distinct geological origin and characteristics.

• **Himalayan Formation**: The Himalayas formed due to collision of the Indo-Australian Plate with the Eurasian Plate (convergent boundary). They are young fold mountains, still rising, and prone to earthquakes.

• **Three Parallel Ranges of Himalayas**: Himadri (Greater Himalayas) — highest and northernmost; Himachal (Lesser Himalayas) — includes hill stations; Shiwaliks (Outer Himalayas) — youngest and southernmost.

• **Northern Plains Formation**: Formed by alluvial deposits of Indus, Ganga, and Brahmaputra river systems. Extremely fertile, supporting dense population and intensive agriculture.

• **Peninsular Plateau**: One of the oldest landmasses (part of Gondwanaland). Composed of igneous and metamorphic rocks. Divided into Central Highlands and Deccan Plateau.

• **Drainage Divide**: Western Ghats act as the water divide — rivers flowing east (Godavari, Krishna, Kaveri) drain into Bay of Bengal; west-flowing rivers (Narmada, Tapi) drain into Arabian Sea.

• **Monsoon Climate**: India has a tropical monsoon climate. Southwest monsoon (June–September) brings most rainfall. Northeast monsoon affects Tamil Nadu coast in winter.

• **Climatic Diversity**: From tropical in the south to alpine in the Himalayas; from arid in Rajasthan to extremely wet in Meghalaya (Mawsynram — highest rainfall).

Formulas / Key Facts

| Feature | Key Fact | |---------|----------| | Highest Peak in India | Kanchenjunga (8586 m) — in Sikkim | | Longest River | Ganga (2525 km within India) | | Largest Plateau | Deccan Plateau | | Highest Plateau | Ladakh Plateau (average 5000 m) | | Western Ghats | Also called Sahyadris; average height 1200 m | | Eastern Ghats | Discontinuous; lower than Western Ghats | | Important Passes | Karakoram Pass, Khyber Pass, Nathu La, Rohtang Pass, Bom Di La | | Major Himalayan Rivers | Indus, Ganga, Brahmaputra (antecedent rivers — older than mountains) | | Peninsular Rivers | Godavari (longest peninsular river), Krishna, Kaveri, Mahanadi, Narmada, Tapi | | Thar Desert Location | Western Rajasthan; receives less than 25 cm annual rainfall | | Island Groups | Andaman & Nicobar (Bay of Bengal); Lakshadweep (Arabian Sea — coral islands) | | Monsoon Months | Southwest: June–September; Northeast: October–December |