Distinguish between :
Soil and Rock.
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Soil |
Rock |
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1. Soil is formed due to erosion and weathering of rocks. Hence, it is an unconsolidated rock material. 2. Soil has layers which have different physical, chemical and biological properties. 3. Soils are the sources of food and moisture for plants. |
1. A rock is naturally occurring mass of solid materials. It is composed of inorganic or organic material. 2. Rock does not have layers. 3. It is not the source of food and moisture for plants. |
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Earth flow |
Mud flow |
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In hilly and mountainous regions of humid climates, water saturated soil and regolith rich in clay matters takes the form of an earth flow. Earth flow is a form of mass wasting in which behaviour of the earth material is that of a plastic solid. Solifluction is an Arctic variety of earth flow in the treeless tundra. |
Mass wasting takes the form of mud flow if proportion of water to mineral matter is large. It travels fast down the channels of stream. Mud flow also originate high in mountains where melting winter snows pick up weathered rocks rich in clay. |
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