Tag: soil erosion (geo)

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Questions Related to soil erosion (geo)

Multiple choice biology the soil soil erosion (geo) soil erosion, soil conservation and uses of soil soil erosion and conservation

Which of the following should be increased to prevent soil erosion?

  1. Flow of water

  2. Green areas

  3. Deforestation

  4. None of these
Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation

Trees keep the soil particles bound together. They have roots that extend deep in the soil. The roots of trees hold the soil particles tightly together and prevent their erosion and washing away due to factors like wind, water, rains etc.

So, option B is the correct answer.

Multiple choice biology the soil soil erosion (geo) soil erosion, soil conservation and uses of soil soil erosion and conservation

Which of the following bind the soil together?

  1. Trees

  2. Pond

  3. River

  4. Layers of the soil
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

Roots of trees hold the soil particles and prevent their loss. When trees are cut on a large scale land becomes barren. This results in the loss of upper soil layer due to heavy wind or flowing water leading to soil erosion. Hence afforestation prevents soil erosion. Thus the correct answer is option A.  

Multiple choice biology the soil soil erosion (geo) soil erosion, soil conservation and uses of soil soil erosion and conservation

How does seeding of areas help in reducing soil erosion?

  1. By allowing flow of water

  2. By collecting runoff water

  3. By avoiding water

  4. None of the above
Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation

Seeding areas increases vegetation, which helps in slowing down water flow and collecting runoff, thereby reducing the amount of soil carried away by water.

Multiple choice biology the soil soil erosion (geo) soil erosion, soil conservation and uses of soil soil erosion and conservation

What prevents soil erosion?

  1. Allowing herbivorous animals to graze excessively

  2. Growing plants to form the soil cover

  3. Increasing fertility

  4. Making the land sloppy
Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation

  • Soil erosion is the loss of the fertile soil due to an absence of plants which can hold the soil. 
  • The roots of the plants allow the soil to be held due to the presence of water. In deforestation, there is the cutting or the removal of plants. 
  • Due to which the water present in the soil gets evaporated resulting in a barren land. 
  • This barren land is prone to soil erosion which results in the loss of the upper layer of the soil.

Thus, the correct answer is option B. 

Multiple choice biology the soil soil erosion (geo) soil erosion, soil conservation and uses of soil soil erosion and conservation

Soil erosion can be reduced by

  1. Grazing cattle

  2. Deforestation

  3. Using renewable resources

  4. Contour ploughing

  5. Increasing biodiversity
Reveal answer Fill a bubble to check yourself
D Correct answer
Explanation
A. Grazing cattle can promote soil erosion because as the cattle eat the vegetation, the soil particles loosen and can be easily carried away by wind, water etc.
B. Deforestation leads to soil erosion because roots of the plants held the soil particles tightly and if there will be no trees, the soil particles will be loosened and can be easily carried away by wind or water.
C. Using renewable resources has no effect on soil erosion as renewable sources are the sources that can be replenished naturally over a period of time.
D. Contour ploughing is the ploughing of land according to its contour or slope to prevent soil erosion.
E. Increasing biodiversity will promote soil erosion as more organisms will be there which will feed on vegetation and this will cause the same effect as that of grazing cattle.
Hence, soil erosion can be reduced by Contour Ploughing.
So, the correct answer is 'Contour ploughing'.
Multiple choice biology the soil soil erosion (geo) soil erosion, soil conservation and uses of soil soil erosion and conservation

Soil erosion can be checked by

  1. Wind screen alone

  2. Restricted human activity

  3. Checking movement of animals

  4. Good plant cover
Reveal answer Fill a bubble to check yourself
D Correct answer
Explanation

A dense and healthy plant cover is the most effective natural deterrent to soil erosion because plant roots bind the soil particles together, while the foliage breaks the direct impact of raindrops and slows down surface runoff. While windscreens and animal control help, good plant cover is the primary ecological mechanism.

Multiple choice evs - i the soil soil erosion (geo) soil erosion, soil conservation and uses of soil soil erosion and conservation sustainability of natural resources adaptations - mangrove swamps, fast flowing rivers and treetops halophiles

Uniform soil erosion by running water is

  1. Gully erosion

  2. Rill erosion

  3. Riparian erosion

  4. Sheet erosion
Reveal answer Fill a bubble to check yourself
D Correct answer
Explanation

Soil erosion is removal of top soil by agency of water (water erosion) and wind (wind erosion). Soil erosion is of two types- natural and anthropogenic. 

Natural or geological erosion is extremely slow removal of top soil due to rain water or wind. 
Anthropogenic soil erosion is caused by removal of plant cover through over grazing, litter collection, tree felling, leaving the soil unprotected during agricultural operations. 
Sheet erosion means removal of extremely thin layer or sheet of soil. It is caused by detachment of soil particles by raindrop impact and their removal downslope by water flowing overland as a sheet (instead of flowing in definite channels or rills). 

Multiple choice biology the soil soil erosion (geo) soil erosion, soil conservation and uses of soil soil erosion and conservation

Removal of soil by the action of wind and water is known as

  1. Soil erosion

  2. Soil conservation

  3. Salination

  4. Calcification
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

(a) Top soil is the vital part of the soil and serves as the chief source of nutrition for plants. Loss or disturbance of top soil by natural agents like water, wind, gravity or ice is called soil erosion.