2. How do exogenetic forces change or modify landforms?
Answers
Answer:
Major landforms are formed by erosion and deposition. Wind, water and ice are the agents of erosion and deposition. Water causes waterfall, floodplain, sea arches, sea cliff formation etc.
Exogenic Forces: Classification
What are exogenic forces? How are exogenic forces classified?
We have been discussing geomorphic processes in our previous notes in the Geography section.
We have already seen that geomorphic processes are classified into endogenic processes and exogenic processes.
As endogenic processes are already covered in detail, in this post we focus on exogenic forces and exogenic processes.
What are Exogenic Forces?
The forces which derive their strength from the earth’s exterior or originate within the earth’s atmosphere are called as exogenic forces or external forces.
The action of exogenic forces results in wearing down and hence they are considered as land wearing forces.
Exogenic Processes or Denudation
The processes which occur on the earth’s surface due to the influence of exogenic forces are called exogenic processes or exogenic geomorphic processes.
Weathering, mass wasting, erosion, and deposition are the main exogenic processes.
All the exogenic processes are covered under a general term- denudation, which means strip off or uncovers.
The elements of nature capable of doing these exogenic processes are termed geomorphic agents (or exogenic geomorphic agents). E.g. the wind, water, waves etc.
Note: A process is a force applied on earth materials affecting the same. An agent is a mobile medium (like running water, moving ice, winds, waves etc) which removes, transport and deposits earth materials.
Geomorphic processes and geomorphic agents especially exogenic, unless stated separately, are one and the same.