NCERT Class 11 Geography Chapter 5 Geomorphic Processes Notes

Inside the NCERT Notes Class 11 Geography Chapter 5 Geomorphic Processes, you will find the process versus agent comparison table, all five landslide types explained side by side, and the full soil formation flow, according to the latest 2026-27 CBSE syllabus.

• 22-page PDF covering endogenic and exogenic processes, weathering, mass movements, erosion, deposition and soil formation.
• 10+ comparison tables, including orogeny vs epeirogeny, the three weathering types, and the five landslide types.
• Mnemonic mind map and a quick-recall appendix for last-minute revision before the 2026-27 exams.

You can find the complete NCERT Notes Class 11 Geography Chapter 5 Geomorphic Processes, including every diagram, table and memory aid, in the sections below.

These NCERT Notes Class 11 Geography Chapter 5 Geomorphic Processes are curated by subject experts, mapped to the 2026-27 NCERT Fundamentals of Physical Geography textbook, and checked against the last five years of CBSE Class 11 question papers.

What Are Geomorphic Processes? Endogenic and Exogenic Forces Explained

The earth's crust is dynamic, and two opposing forces keep reshaping it. Endogenic forces act from within the earth and build up relief. Exogenic forces act from the atmosphere and wear that relief down. Their constant push and pull is why no two hillsides ever look the same.

• Endogenic forces are powered by radioactivity, tidal friction and heat left over from the earth's formation.
• Exogenic forces are powered mainly by the sun, working through wind, water, ice and waves.
• Gradation is the wearing down of relief through erosion. It never fully wins, because endogenic forces keep building new relief at the same time.

NCERT defines geomorphic processes as the endogenic and exogenic forces that cause physical stress and chemical action on earth material, changing the shape of the earth's surface. Diastrophism and volcanism are endogenic. Weathering, mass wasting, erosion and deposition are exogenic.

Geomorphic Processes Explained: Class 11 Geography Video Recap

Source: Magnet Brains on YouTube

Geomorphic Agent vs Geomorphic Process: The Key Difference

Two terms trip up most Class 11 students: geomorphic process and geomorphic agent. A process is a force applied on rock material. An agent is the mobile medium, such as running water or a glacier, that carries material away. Gravity activates every stage of both.

Endogenic Processes: Diastrophism and Volcanism in Class 11 Geography

Diastrophism covers every process that moves, elevates or folds the earth's crust. NCERT groups it into four types: orogenic processes, epeirogenic processes, earthquakes and plate tectonics. Orogeny builds mountains; epeirogeny builds continents.

Volcanism is the other endogenic process. It covers the movement of magma toward the earth's surface, plus the intrusive and extrusive landforms that magma leaves behind. This chapter builds directly on the volcanism and igneous rock content from earlier chapters in the same unit.

Why Exogenic Processes Depend on the Sun, Stress and Rock Structure

Exogenic processes get their energy from the atmosphere, ultimately from the sun, and from gradients created by tectonic factors. All of them fall under one umbrella term: denudation, meaning to strip off or uncover.

• Denudation includes weathering, mass wasting, erosion and transportation.
• Shear stress along the faces of rock is what actually breaks it apart.
• Temperature and precipitation are the two climatic elements that control most exogenic processes.
• The same rock can resist one process well and resist another poorly, depending on climate and rock structure.

The Three Types of Weathering Every Class 11 Student Must Know

Weathering is the mechanical disintegration and chemical decomposition of rock through weather and climate. It happens in-situ, meaning almost no material moves away from where it breaks down. NCERT groups weathering into three types.

Exfoliation is the flaking off of curved rock sheets caused by weathering. NCERT is specific that exfoliation is a result of weathering, not a fourth type of weathering. Weathering also feeds the national economy directly: it concentrates valuable ores of iron, manganese, aluminium and copper into deposits worth mining, a process called enrichment.

Mass Movements and the Five Landslide Types Explained

Mass movements shift rock debris downslope under gravity alone. No geomorphic agent carries the material away, which is why mass wasting is not classified as erosion. Weathering aids mass movement but is not a strict requirement for it.

The Himalayas see far more frequent landslides than the Nilgiris and Western Ghats. The Himalayas are tectonically active, made largely of sedimentary and unconsolidated rock, and have very steep slopes. The Western Ghats are more stable and made of harder rock, though heavy short-period rainfall still triggers rock falls along their near-vertical cliffs.

Erosion and Deposition: How Wind, Water, Glaciers and Waves Reshape Land

Erosion is the acquisition and transport of rock debris by a geomorphic agent. Three erosional agents are controlled by climate, and each represents a different state of matter: wind (gas), running water (liquid) and glaciers (solid).

Deposition follows erosion. As an agent loses velocity on gentler slopes, it drops the material it carries. Coarser material is deposited first, and finer material settles later, gradually filling depressions.

Soil Formation: Pedogenesis and the Five Soil-Forming Factors

Soil formation, or pedogenesis, starts with the weathering mantle. Bacteria, moss and lichen colonise it first, humus builds up, and grasses and trees follow. Five factors control how a mature soil profile finally forms.

Rhizobium bacteria, living in the root nodules of leguminous plants, fix atmospheric nitrogen into a form plants can use. This single detail explains why farmers rotate legume crops through their fields, and it is a favourite short-answer question on this chapter.

Common Mistakes Students Make in the Geomorphic Processes Chapter

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