The scale 1 cm = 2 meters is a scale of 1: 200 (1/200th scale).

No such thing.

Some geometers consider time to be the fourth dimension.

There is a "geologic time scale" which is the time scale at which you notice continents moving and mountain ridges growing and being eroded (very long time scale)

The geological time scale organizes a long period of time.

On a geologic time scale, yes. On any other time scale, no.

The time scale of the weathering process can be defined time - scales of erosion and sedimentary.