how is soil formed. explain briefly.
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Soil is formed by breaking up of rocks into very fine particles. Formation of soil is not a one or two day process,it takes millions of years to form just one thin layer of soil.
Formation of soil takes place by the following factors :
1)By Sun: The sun heats up the rocks and this the rocks gets expanded. At night these rocks cool and contract. Since all part of the rock do not gets contract or expand at the same rate thus,the huge rocks breaks into smaller pieces.
2) By water: water could get into the cracks of the rocks formed due to uneven heating of sun and if this water in the crack freezes,it would cause cracks.
3)Wind: Strong winds also erode rocks down and thus the soil particles will be formed.
4) Living Organisms: The lichens that grows on the surface of rocks, while growing,they release certain substances that cause the rocks surface to powder down and form a thin layer of soil.
These are the ways which are responsible for the formation of soil.
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Ahoy dear user☺️
=> How is soil formed ?
⏬ANSWER⏬
Soil is a mixture of small particles of rocks and humus (i.e., organic matter obtained from decaying of living organisms or their wastes). Temperature variations due to radiations of the sun, rain water, winds and living organisms influence the information of soil from the rocks involving two processes: weathering and paedogenesis.
> Breakdown of bigger rocks into small, fine soil particles is called weathering.
> It may occur due to physical, chemical or biological means.
> Under the influence of solar radiations, rocks heat up and expand.
> At night, these rocks cool down and contract.
> Since all the parts of rocks do not expand and contract at the same rate, cracks appear in the rocks and ultimately the large rocks breakdown into smaller pieces.
> Flow of water through or over the rocks make the cracks bigger.
> Flowing/falling water also has a erasing effect on the rocks.
> On freezing the water expands in rock crevices and break the rocks.
> Similarly, strong winds continue to run against hard rocks and erode them.
> Growth of lichens, mosses and other plants also influence the formation of soil by eroding the rocks over which they are growing.
Paedogenesis involves the decomposition of organic materials by bacteria and fungi and humification and mineralization of decomposed matter. Earthworms also play an important role in the soil formation.
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Hope this helps✌️
=> How is soil formed ?
⏬ANSWER⏬
Soil is a mixture of small particles of rocks and humus (i.e., organic matter obtained from decaying of living organisms or their wastes). Temperature variations due to radiations of the sun, rain water, winds and living organisms influence the information of soil from the rocks involving two processes: weathering and paedogenesis.
> Breakdown of bigger rocks into small, fine soil particles is called weathering.
> It may occur due to physical, chemical or biological means.
> Under the influence of solar radiations, rocks heat up and expand.
> At night, these rocks cool down and contract.
> Since all the parts of rocks do not expand and contract at the same rate, cracks appear in the rocks and ultimately the large rocks breakdown into smaller pieces.
> Flow of water through or over the rocks make the cracks bigger.
> Flowing/falling water also has a erasing effect on the rocks.
> On freezing the water expands in rock crevices and break the rocks.
> Similarly, strong winds continue to run against hard rocks and erode them.
> Growth of lichens, mosses and other plants also influence the formation of soil by eroding the rocks over which they are growing.
Paedogenesis involves the decomposition of organic materials by bacteria and fungi and humification and mineralization of decomposed matter. Earthworms also play an important role in the soil formation.
******************************************************************************
Hope this helps✌️
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