Class 11 Geography - KERALA
Geomorphic Processes
The chapter 'Geomorphic Processes' in Class 11 Geography explains how the earth's surface is constantly reshaped by internal (endogenic) and external (exogenic) forces. You will learn about earth movements like diastrophism and volcanism, as well as weathering, mass wasting, erosion, and deposition that create diverse landforms. Understanding these processes is crucial for Kerala SCERT board exams as it forms the foundational base for subsequent chapters on landforms and geomorphology, frequently appearing in both short answers and map-based questions.
Start Learning FreeKey Concepts
Geomorphic Processes
The physical and chemical actions that result in changes to the earth's surface configuration through endogenic and exogenic forces.
Endogenic Processes
Internal forces originating from deep within the earth, driven by geothermal energy, causing diastrophism, earthquakes, and volcanism.
Exogenic Processes
External forces originating from the earth's atmosphere, such as weathering, erosion, and deposition, which wear down relief features.
Weathering
The mechanical disintegration and chemical decomposition of rocks in situ (on the spot) without much transportation of materials.
Mass Wasting
The movement of rock debris down a slope under the direct influence of gravity, including slow processes like creep and fast ones like landslides.
Cycle of Erosion
The uninterrupted sequence of changes through which a landform passes, progressing from youth to mature and old stages.
Important Formulas
Board Exam Info
This chapter typically carries around 6-8 marks in the Kerala SCERT Class 11 Geography annual examinations. Common question types include direct definitions of exogenic and endogenic processes, distinguishing between weathering and erosion, short notes on mass wasting, and essay-type questions explaining various types of weathering.
Frequently Asked Questions
What is the main difference between weathering and erosion?
Weathering is the breaking down of rocks in place without transportation, whereas erosion involves both the acquisition and transportation of weathered rock debris by geomorphic agents like running water or wind.
Why are endogenic forces called internal forces?
They derive their energy from the earth's interior, originating from radioactivity, rotational and tidal friction, and primordial heat, operating from below the earth's crust.
How does climate affect the rate of weathering?
Climate is the most important factor in weathering. High temperatures and heavy rainfall (humid climates) promote rapid chemical weathering, while extreme cold or arid climates favor mechanical weathering.
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