Tag: pollution of soil

Questions Related to pollution of soil

Most fertile layer of soil is

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  1. top layer

  2. organic layer

  3. middle soil layer

  4. all of these

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Correct Option: A

Replanting forest at places where they were destroyed is called :

evs - i the environment and us damaging the forests deforestation and afforestation protecting our environment pollution of soil degradation of land

  1. reforestation

  2. desertification

  3. replantation

  4. degradation

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Correct Option: A
Explanation:

A- Reforestation is natural or intentional restocking of forests that have been depleted mainly due to deforestation or any natural calamity. Reforestation gives boost to the wild life and helps in improving the air quality, climate control, improvement in natural resources and many more advantages for living beings.

Which of the following prevents afforestation in deserts?

evs - i the environment and us damaging the forests deforestation and afforestation protecting our environment pollution of soil degradation of land

  1. Goat and grazing animals

  2. Local resident

  3. Unfertility of soil

  4. Low rainfall

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Correct Option: D
Explanation:

Major problem in desert is lack of rainfall. While grazing of animals and local residents can be controlled but without rainfall growth of trees and afforestation is not possible. 

Forest reserves can be protected through all measures except

evs - i the environment and us damaging the forests deforestation and afforestation protecting our environment pollution of soil degradation of land

  1. Laws inhibiting tree felling

  2. Laws allowing tree felling 

  3. Prohibition of hunting

  4. Human population control

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Correct Option: B

Plants control the humidity in air by

evs let's plant trees damaging the forests deforestation and afforestation protecting our environment pollution of soil degradation of land

  1. Photosynthesis

  2. Transpiration

  3. Photorespiration

  4. All of the above

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Correct Option: B
Explanation:

Plants absorb water from the soil and looses it to the atmosphere by transpiration,hence,control the humidity in air by acting as a water exchanger between ground and atmosphere.

Deforestation causes__________ to linger in the atmosphere.

evs let's plant trees damaging the forests deforestation and afforestation protecting our environment pollution of soil degradation of land

  1. $CO _2$

  2. $H _2O$

  3. $O _2$

  4. $N _2$

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Correct Option: A
Explanation:

Deforestation causes carbon dioxide to linger in the atmosphere. As carbon dioxide accrues, it produces a layer in the atmosphere that traps radiation from the sun. The radiation converts to heat which causes global warming, which is better known as the greenhouse effect.

The establishment of forest growth on areas that either had forest or lacked it is known as

evs - i the environment and us damaging the forests deforestation and afforestation protecting our environment pollution of soil degradation of land

  1. Deforestation.

  2. Organic farming.

  3. Forestation.

  4. None of these.

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Correct Option: C

The establishment of a forest or stand of trees in an area where there was no previous tree cover is known as

evs - i the environment and us damaging the forests deforestation and afforestation protecting our environment pollution of soil degradation of land

  1. Deforestation.

  2. Afforestation.

  3. Forestation.

  4. None of these.

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Correct Option: B

Forests return most of the water that falls as precipitation to the atmosphere by

evs let's plant trees damaging the forests deforestation and afforestation protecting our environment pollution of soil degradation of land

  1. Phororespiration

  2. Respiration

  3. Transpiration

  4. All of the above

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Correct Option: C
Explanation:

Transpiration is the process by which plants loose water through their leaves in the atmosphere.

Which of the following contributes the most towards deforestation?

evs let's plant trees damaging the forests deforestation and afforestation protecting our environment pollution of soil degradation of land

  1. Logging

  2. Commercial agriculture

  3. Subsistence farming

  4. None of the above

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Correct Option: C
Explanation:

Subsistence farming is responsible for $48$% of deforestation; Commercial agriculture is responsible for $32$%; logging is responsible for $14$%, and fuel wood removals make up $5$%.