What is weathering and mass movement?

Weathering:

Weathering is defined as the mechanical disintegration and chemical decomposition of rocks through the actions of various elements of weather and climate. There are a number of processes within weathering that act either individually or together to affect the earth materials in order to reduce them to fragmental state. There are three major groups of weathering processes : (i) chemical; (ii) physical or mechanical; (iii) biological weathering processes.

Mass movement:

Mass movement is the movement of masses of bodies of mud, bedrock, soil, and rock debris, which commonly happen along steep-sided hills and mountains because of the gravitational pull. That means, air, water or ice do not carry debris with them from place to place but on the other hand, the debris may carry with it air, water or ice.

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