Tag: the environment and us

Questions Related to the environment and us

The cutting down of trees and setting them on fire and raising crops on the resulting ash is called:

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

  1. Pyrolysis

  2. Jhum

  3. Taungya system

  4. Shift cultivation

Show answer
Correct Option: B

Many wild animals have either become extinct or are endangered mainly due to 

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

  1. Scarcity of food

  2. Over crowding

  3. Hunting

  4. Deforestation

Show answer
Correct Option: D
Explanation:

An endangered species is the species whose population faces a sudden downfall. In the case of wild animals, their habitat is the forest and deforestation of the forests due to ecological disasters, or use of timber for the construction of buildings makes them insecure in their homestead. 

Moving away to nearby locations not only disturbs the food chain, breeding grounds and habitats of these wild animals but they are also faced with threats of being hunted and poached for the benefit of the human beings. 
So, the correct answer is 'Deforestation'

An effect of deforestation is

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

  1. Desertification

  2. Soil erosion and floods

  3. Depletion of wildlife

  4. All of the above

Show answer
Correct Option: D
Explanation:

Deforestation is the destruction of forest which causes loss of habitat and other problem like

1. Reduced biodiversity: when forest cover is removed, wildlife is deprived of habitat and becomes more vulnerable to hunting. 
2. The release of greenhouse gas emissions: deforestation causes 15% of global greenhouse gas emissions. 
3. Disrupted water cycles: as a result of deforestation, trees no longer evaporate groundwater, which can cause the local climate to be much drier. 
4. Increased soil erosion: deforestation accelerates rates of soil erosion, by increasing runoff and reducing the protection of the soil from tree litter. 
5. Disrupted livelihoods: millions of people rely directly on forests, through shifting cultivation, hunting and gathering and by harvesting forest products, such as rubber. 
Thus, the correct answer is option D.

Which of the following defines the effect of deforestation on cities (urban areas)?

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

  1. Increase the risk of floods and droughts

  2. Global warming

  3. Both A and B

  4. None of the above

Show answer
Correct Option: C
Explanation:
Effects of deforestation on the Earth:
As a result of deforestation, chances of desertification, droughts, floods, etc. increase. Deforestation can also increase the level of CO$ _2$ in the atmosphere, it will lead to an increase in temperature i.e., global warming. As a result, the entire natural water cycle will get disrupted. This again increases the risk of natural calamities.

Which of the following defines the effect of deforestation on earth?

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

  1. Increased chances of desertification, droughts, floods

  2. Increase in the level of $O _2$

  3. Global warming

  4. Both A and C

Show answer
Correct Option: D
Explanation:
Effects of deforestation on the Earth:
As a result of deforestation, chances of desertification, droughts, floods, etc. increase. Deforestation can also increase the level of CO$ _2$ in the Earth, it will lead to an increase in temperature i.e., global warming. As a result, the entire natural water cycle will get disrupted. This again increases the risk of natural calamities.
Global Warming is the increase of Earth's average surface temperature due to the effect of greenhouse gases, such as carbon dioxide emissions from burning fossil fuels or from deforestation, which trap heat that would otherwise escape from Earth.
Hence, the correct answer is option D.

Which of the following defines the effect of deforestation on villages? 

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

  1. Top layer of the soil will be easily removed

  2. Soil erosion

  3. Less fertile soil

  4. All of the above

Show answer
Correct Option: D
Explanation:

Effects of deforestation on villages- Roots of plants hold soil particles together. In the absence of plants, the top layer of the soil will be easily removed by the action of high-speed winds or water flow. Thus, deforestation increases the chances of soil erosion. As a result, soil loses humus and become less fertile. Hence, a fertile land, which is a source of living for farmers in villages, gets converted into a desert.

Therefore, the correct answer is option D.

Which of the following defines the effect of deforestation on wild animals?

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

  1. Habitat of wild animals is developed, then their numbers would automatically decline.

  2. Habitat of wild animals is destroyed, then their numbers would automatically decline.

  3. Habitat of wild animals is destroyed, then their numbers would increase.

  4. All of the above.

Show answer
Correct Option: B
Explanation:
Deforestation is the clearing of forest which causes loss of habitat. If the habitat of wild animals is destroyed, then their numbers would automatically decline as they start moving towards urban and rural areas to meet their requirement and search a better option for their survival.
So, the correct answer is option B.

Deforestation is the major cause of

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

  1. Transpiration

  2. Genetic erosion

  3. Desertification of habitat

  4. All of the above

Show answer
Correct Option: C
Explanation:

Deforestation is the cutting of trees. When trees are lost due to deforestation, the result can be a drier climate and desertification, or the transformation of the once fertile land to desert.

Deforestation is the term that describes the cutting down or clearing of trees from a wooded area. 
Tree roots absorb water from the ground and return water vapor back to the atmosphere. If trees are removed and can no longer contribute to the water cycle and thus, transform into a much drier climate. This dry environment can spread due to a decrease in atmospheric water vapor and results in a decline in precipitation levels in the area and leads to the desertification
Thus, the correct answer is option C.

Deforestation generally decreases 

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

  1. Rainfall

  2. Soil erosion

  3. Drought

  4. Global warming

Show answer
Correct Option: A
Explanation:

When forests are destroyed, the atmosphere, water bodies and the water table are all affected. Trees absorb and retain water in their roots and some of this moisture is transpired into the atmosphere, regulates the water cycle. When this process is broken, the atmosphere and water bodies begin to dry out. 

Therefore, the correct answer is option A.

Frequent floods in plains of Northern India is due to

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

  1. Excessive rainfall

  2. Siltation of dams

  3. Deforestation in catchment areas

  4. Agriculture

Show answer
Correct Option: C
Explanation:

Frequent floods in plains of Northern India is due to deforestation in catchment areas. Deforestation in the catchment area has led to an increase in the silt content of the river flow. Bihar is India's most flood-prone State, with 76% of the population in the north Bihar living under the recurring threat of flood devastation.

Removal of vegetation cover has caused widespread erosion in Western Ghats, Uttar Pradesh and in Himachal Pradesh.