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Erosion....obviously
This is called weathering.
It is erosion or weathering.
The term that is defined as erosion that occurs in open air is weathering.
The natural process by which rock are crushed or moved is called mass wasting. This is a general term which refers to erosion, weathering and transport down the slope due to gravity.
If you're talking about a natural process, I think it's decomposition. Breaking down exposed rock into smaller fragments could also be done by physical crushing.
Regolith
Dirt is a laymans term for anything that isn't a rock really isn't it!
weathering is the process of which wind, water, chemicals, or other things wear down a mineral. This is what erosion is.Ans 2 -Weathering is also a term used by modelmakers, especially those who make models of tanks, trucks and aircraft. It is the technique of making those vehicles look 'used and abused'
Erosion
erosion