Geography — Study Notes for KTET Category II/III

Overview

Geography forms a significant portion of the Social Science paper in KTET Categories II and III, covering physical, human and economic geography with special emphasis on India and Kerala. This subject tests your understanding of earth's physical features, climate patterns, human settlements, resource distribution and map-reading skills.

For KTET success, you must master three interconnected areas: (1) physical geography concepts including landforms, atmosphere and hydrosphere, (2) regional geography of India and Kerala with their distinctive features, and (3) practical skills like map interpretation. Questions typically range from factual recall (identifying rivers, districts) to application-based queries (reading map symbols, understanding climate patterns). Kerala-specific geography receives substantial weightage, so thorough knowledge of the state's 14 districts, backwaters, Western Ghats and unique geographical features is essential.

Key Concepts

• **Earth in the Solar System**: Earth is the third planet from the Sun, tilted at 23.5° on its axis. This tilt causes seasons. Earth's rotation (24 hours) causes day-night; revolution around Sun (365.25 days) marks a year.

• **Latitudes and Longitudes**: Latitudes are horizontal lines measuring 0° to 90° North/South from Equator. Longitudes are vertical lines measuring 0° to 180° East/West from Prime Meridian. India lies between 8°4'N to 37°6'N latitude and 68°7'E to 97°25'E longitude.

• **Landforms**: Major landforms include mountains (fold, block, volcanic), plateaus (raised flat lands), plains (formed by river deposits) and coastal areas. India has the Himalayas (young fold mountains), Deccan Plateau and Indo-Gangetic Plains.

• **Atmosphere Layers**: Troposphere (weather phenomena, 0-12 km), Stratosphere (ozone layer, 12-50 km), Mesosphere (50-80 km), Thermosphere (80-700 km) and Exosphere (outermost).

• **Water Cycle**: Evaporation → Condensation → Precipitation → Collection. This continuous cycle maintains earth's water balance.

• **Monsoons**: India experiences Southwest Monsoon (June-September, Arabian Sea and Bay of Bengal branches) and Northeast Monsoon (October-December, important for Tamil Nadu and Kerala).

• **Kerala's Unique Geography**: Three geographical divisions — highlands (Western Ghats), midlands (laterite hills) and lowlands (coastal plains with backwaters). 44 rivers, 14 districts, and Vembanad Lake (largest lake in Kerala).

Formulas / Key Facts

| Category | Key Facts | |----------|-----------| | **Earth** | Equatorial diameter: 12,756 km; Polar diameter: 12,714 km; Earth's age: approximately 4.5 billion years | | **India** | Area: 32.87 lakh sq km; 7th largest country; Tropic of Cancer (23.5°N) passes through 8 states | | **Indian Rivers** | Ganga (2,525 km), Brahmaputra, Indus (west-flowing); Godavari (longest peninsular river), Krishna, Kaveri | | **Kerala** | Area: 38,863 sq km; Coastline: 580 km; Highest peak: Anamudi (2,695 m); 44 rivers (41 west-flowing, 3 east-flowing) | | **Kerala Districts** | 14 districts; Palakkad has Palakkad Gap (only break in Western Ghats in Kerala); Idukki is largest by area; Alappuzha is smallest | | **Climate Zones India** | Tropical, Subtropical, Arid, Semi-arid, Alpine; Kerala has tropical monsoon climate | | **Map Scales** | Large scale (1:50,000 or less) shows more detail; Small scale (1:250,000 or more) shows larger area with less detail |