_______________ is also known as physical weathering.
Mechanical weathering
Biological weathering
Chemical weathering
None of these
___________ is the uppermost layer of the crust of earth, which permits plants and other organisms to grow in it.
Land
Water
Soil
Rocks
________ is a process in which a land surface is built up by deposition and accumulation of rock waste.
Degradation
Gradation
Disintegration
Aggradation
Gradation is broadly divided into _________ types.
Two
Three
Four
Five
__________ is when, along with sheet erosion, running water makes thin finger shaped channels called rills and washes away the soil.
Rill erosion
Wind erosion
Gully erosion
Water erosion
__________ is the process of the combination of oxygen with the rocks, which results in the formation of new chemical compound.
Solution
Hydration
Oxidation
Carbonation
The __________ is the top layer which has very fine particles and is made up of the decayed remains of plants and animals.
'D' horizon
'B' horizon
'O' horizon
'A' horizon
The layers or horizons of soil are determined by ___________.
Soil erosion
Soil profile
Soil degradation
Soil conservation
The external forces try to reduce the elevations and fill up the depressions on the surface of the earth process is known as _________ .
The chemical union of water with a mineral is called ____________.