Geography Ch 1 Lithosphere – I Endogenetic Processes — Social Science STD 9 — Question
Tamilnadu BoardEnglish MediumSTD 9Social ScienceGeography Ch 1 Lithosphere – I Endogenetic Processes5 Marks
Question
Write a note on the internal and external processes of Earth.
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Answer
Geomorphic processes:
The formation and deformation of landforms on the surface of the earth is a continuous activity of two broad processes i.e. internal and external.
These processes cause stress and deformation on earth materials and finally bring changes on the surface of the earth.
These are referred to as geomorphic processes.
Internal Processes (or) Endogenetic processes:
The forces that act from the earth’s interior towards the earth’s surface are called internal processes endogenetic processes.
These forces build the landscape and create topographic relief.
The internal processes generate heat and eject materials from deep below the earth’s crust.
Internal radioactivity is the principal source of power for this process.
External Processes (or) Exogenetic Processes
The forces that act on the surface of the earth due to natural agents like running water, glacier, wind, waves, etc., are called External processes or Exogenetic processes.
These external processes tear the landscape down into relatively low elevated plains.
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