physical geography landforms - Geography Ebooks | TheGeoecologist

Question 1

What is the difference between endogenic and exogenic geomorphic processes?

Accepted Answer

Endogenic processes originate from Earth's internal heat (radioactive decay, primordial heat) and drive plate tectonics, volcanism, and mountain building. Exogenic processes are powered by solar energy and gravity, causing weathering, erosion, mass wasting, and deposition by agents like water, wind, and ice. Endogenic forces build relief; exogenic forces wear it down.

Question 2

Which are the most important landforms to study from NCERT Class 11 Chapter 6 for exams?

Accepted Answer

High-yield landforms include: Himalayan orogeny (fold mountains), Deccan Traps (flood basalts), fluvial landforms (waterfalls, meanders, deltas like Sundarbans), glacial landforms (cirques, U-valleys, moraines), karst topography (stalactites/stalagmites, sinkholes), coastal features (cliffs, spits, lagoons), and aeolian dunes (barchans, loess). Diagram-based questions frequently test these.

Question 3

How do geomorphic processes endogenic exogenic interact in the Himalayas?

Accepted Answer

The Himalayas exemplify dynamic equilibrium: the Indian plate converges with Eurasia at ~40-50 mm/yr (endogenic uplift), while monsoon-driven rivers (Ganga, Brahmaputra) and glaciers erode ~1-2 billion tonnes of sediment annually (exogenic denudation). Isostatic rebound compensates for erosion, maintaining high relief. This interplay creates seismic hazards, landslides, and fertile alluvial plains simultaneously.

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Geomorphic Processes Endogenic Exogenic: Complete NCERT Class 11 Guide