Q. 315.0( 1 Vote )

One of the following factors does not lead to soil formation in nature:
A. The sun

B. Water

C. Wind

D. Polythene bags

Answer :

Soil formation occurs by a process called weathering off rocks.

For this breaking down of rocks a number factors are needed like,

Sun: - During daytime sun heats up the rocks due to which a little bit expansion of rocks occurs. At night when temperature falls rocks tend to contract, due to this simultaneous and subsequent heating and cooling cracks are formed inside the rocks. This phenomenon can be easily observes at hilly areas during rainy season. After the rain when sun emerges it heats up the wet and cool mountains but they tend to resist due to which breaking of mountains occur.

Water: - Water is another factor that helps in soil formation. Water fills up the cracks developed due to heating and cooling of rocks and at causes the cracks to widen up more.

Also water takes away the smaller rocks and cause them to grind over one another ultimately causing them to break.

Wind: - wind also works the same way by taking away the sand from one place to another.

Living organism: - Some living organisms like lichens are the pioneer community i.e. they colonize the rocks first as the first living organism and they secrete certain acids when they grow on these rocks. Due to this secretion rocks becomes weak and breaks down easily. Roots of bigger trees can penetrate these rocks and can help in their breakdown. Along with them, another microorganisms and mosses help in weathering of rocks.

While polythene doesn’t play any role during this process.

Rate this question :

How useful is this solution?
We strive to provide quality solutions. Please rate us to serve you better.
Related Videos
NCERT | People as Resources51 mins
The Demand of Increasing Population41 mins
Estimating the power of a common man50 mins
NCERT | Sneak Peek into Imp. Qs.- Vegetation55 mins
Into The Wild - Learning Vegetation52 mins
Try our Mini CourseMaster Important Topics in 7 DaysLearn from IITians, NITians, Doctors & Academic Experts
Dedicated counsellor for each student
24X7 Doubt Resolution
Daily Report Card
Detailed Performance Evaluation
view all courses

Give two effects of soil erosion.

Dr. P.S. Verma & Dr. V.K. Agarwal - Biology

Forest destruction results in

Dr. P.S. Verma & Dr. V.K. Agarwal - Biology

Write a note on nitrogen fixation?

Dr. P.S. Verma & Dr. V.K. Agarwal - Biology

How do organisms contribute in the formation of soil?

Dr. P.S. Verma & Dr. V.K. Agarwal - Biology

What is soil erosion? Explain means of preventing it.

Dr. P.S. Verma & Dr. V.K. Agarwal - Biology

Give various sources and harmful effects of soil pollution.

Dr. P.S. Verma & Dr. V.K. Agarwal - Biology