Class 11 Geography - PUNJAB
Structure and Physiography
The chapter 'Structure and Physiography' in PSEB Class 11 Geography explores the geological structure and diverse physical landscape of India. Students learn about the peninsular plateau, the mighty Himalayas, the Indo-Gangetic-Brahmaputra plain, and the coastal plains and islands. The chapter explains how tectonic movements shaped the Indian subcontinent and divides the country into distinct physiographic divisions. This is a high-scoring and fundamentally crucial chapter for Punjab Board exams as it lays the foundation for understanding India's climate, drainage, and natural vegetation, frequently featuring map-based questions and long-answer descriptive queries.
Start Learning FreeKey Concepts
Peninsular Block
A stable, ancient landmass composed of Archaean gneisses and granites, forming the oldest part of the Indian subcontinent.
Himalayan Mountain System
Young, weak, and flexible fold mountains formed by the convergence of the Indo-Australian and Eurasian tectonic plates.
Indo-Gangetic-Brahmaputra Plain
A vast alluvial plain formed by the deposition of sediments brought down by three major river systems, vital for India's agriculture.
Physiographic Divisions
The classification of India into six distinct physical regions based on geological structure, relief, and climate.
Continental Drift Theory
Alfred Wegener's theory explaining how the Indian peninsula broke away from the supercontinent Gondwanaland and drifted northwards.
Important Formulas
Board Exam Info
This chapter typically carries around 6 to 8 marks in the Punjab (PSEB) Class 11 Geography board examinations. Common question types include long-answer questions describing the major physiographic divisions of India, short-note questions on the Himalayan mountain ranges or Peninsular plateau, and map-based questions identifying specific mountain peaks, hills, or plains.
Frequently Asked Questions
What is the difference between the Himalayan rivers and Peninsular rivers in terms of their origin?
Himalayan rivers originate from glaciers and are perennial, whereas Peninsular rivers are rain-fed and mostly seasonal.
Why are the Himalayas called young fold mountains?
They were formed recently in geological time (Tertiary period) due to the folding of earth's crust caused by plate tectonics, and they are still rising.
How were the Northern plains of India formed?
They were formed by the continuous deposition of silt and alluvium by the Indus, Ganga, and Brahmaputra rivers over millions of years in a massive tectonic depression.
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