Tag: the environment and us

Questions Related to the environment and us

Which one is not a natural factor for causing soil erosion?

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

  1. Gullying

  2. Clips

  3. Rilling

  4. Deforestation

Show answer
Correct Option: D
Explanation:

Soil erosion is the process of weathering of top layer of soil either due to natural factor or artificial factor. The natural factors are called as erosion agents. These include water, wind, ice. Water produces 4 types of erosion, namely splash erosion, sheet erosion, rill erosion, and gully erosion. Gully erosion occurs due to drainage of soil by surface water runoff. Rilling erosion is the erosion due to concentrated water running through little streamlets. Deforestation is the artificial or man-made factor for causing soil erosion.

Thus, the correct answer is 'Deforestation.'

Planting of trees, shrubs and others in between crop plants for stabilisation of soil is

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

  1. Taungya

  2. Social forestry

  3. Production plantation

  4. Agroforestry

Show answer
Correct Option: D
Explanation:
  • Agroforestry is the planting of trees, shrubs, and others in between crop plants.
  • Advantages of agroforestry practices include Increased crop production and economic gain. Soil conservation and improved soil quality. Sequestration of atmospheric carbon.
  • Hence Planting of trees, shrubs, and others in between crop plants for stabilization of soil is Agroforestry.
  • So, the correct answer is 'Agroforestry'.

Decreased rainfall in northern areas 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. Changes in sun

  2. Global phenomenon

  3. Deforestation in catchment areas

  4. Deforestation in evaporating area near equator

Show answer
Correct Option: C
Explanation:

Deforestation leads to irregular water cycle, as a result there is decreased rainfall, deforestation in catchment areas is the main resaon behind the decreased reainfall in northern region.

So, the correct option is 'Deforestation in catchment areas'.

Afforestation in relation to urban development is component of

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

  1. Social forestry

  2. Integrated forest development

  3. Agroforestry

  4. Fuel forestry

Show answer
Correct Option: B
Explanation:
  • Afforestation is the process of planting trees, or sowing seeds, in a barren land devoid of any trees to create a forest. The term should not be confused with reforestation, which is the process of specifically planting native trees into a forest that has decreasing numbers of trees.
  • Hence Afforestation in relation to urban(cities) development is a component of Integrated forest development.
  • So, the correct answer is 'Integrated forest development'.

A movement similar to Chipko which has spread in South is

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

  1. Uliso

  2. Appiko

  3. Belesu

  4. Balasu

Show answer
Correct Option: B
Explanation:
The Chipko Movement was launched by Chandi Prasad Bhatt and Sunder Lal Bahuguna in 1973, against large scale cutting of trees by timber contractors in the Uttarakhand hills. The movement started in Chamoli district of Garhwal region in Uttarakhand. Local hill women from villages were organised and made aware of ecological threat in the hills. They actively participated in the campaign. They embraced or hugged the trees when the timber contractors reached and forced them to leave. This novel campaign for saving hill forests and greenery spread all along the hill region and to Karnataka in South also in 1983. In Karnataka, it was named as Apikko movement which was started by Appu and Mamtha in a small village named Gubbi Gadde near Sirsi.
So, the correct answer is 'Apikko'.

Maximum damage to forest cover is caused by

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

  1. Edaphic factors

  2. Climatic factors

  3. Biotic factors

  4. Physiographic factors

Show answer
Correct Option: C
Explanation:
A. Edaphic factors are the abiotic factors that relate to structure and composition of soil.
B. Climatic factors include rain, wind, earthquake etc. which are related to climate.
C. Biotic factors are the living components of an ecosystem which include producers and consumers.
D. Physiographic factors are the factors associated with physical nature and topography of an area.
Maximum damage to forest is caused by biotic factors as overgrazing destroy vegetation and also due to human activities. 
So, the correct answer is 'Biotic factors'.

When we destroy forest, what we are actually destroying?

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

  1. Only food for the wild life

  2. Only wild life's habitat

  3. Only trees

  4. Only environment

Show answer
Correct Option: D
Explanation:

Forests are important for the environment as well as human life.

  1. Half of the earth's oxygen is generated by forests. Thus cutting down forests will cause gradual depletion of oxygen.
  2. Forests support wildlife and are the shelter for these animals. Destroying them will cause death and extinction of these wildlife animals.
  3. The trees absorbs the carbon dioxide generated by industries, transportation and other human activities. Most of the pollution control is brought about by forests.
  4. Forests control floods.
  5. They also help in regulating regional climate.
Thus destroying forests is indirectly destroying the environment.

If forest cover is reduced to half, what is most likely to happen on a long term basis? 

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

  1. Tribals living in these areas will starve to death.

  2. Domestic animals in these and joining areas will die due to lack of fodder.

  3. Large biomes will become deserts.

  4. Crop breeding programes will suffer due to a reduced ability of variety of germplasm.

Show answer
Correct Option: A
Explanation:

If forest cover is reduced to half, it would adversely affect the inhabitants. In rural areas, a community of people lives in the forest as a part of their tradition. They are completely dependent on the forest for their basic needs. They worship the trees and consider it as their ancestral belongings. The dependent tribals on a particular forest will be harmed by the clearing of the forest.

In the recent years, there has been an increasing incidence of floods in the plains of northern India, because

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

  1. There has been an increase in annual rainfall.

  2. The rate of silting of dams has gone lip.

  3. There has been increased deforestation in the catchment areas.

  4. Increased areas of land is being self cultivated.

Show answer
Correct Option: C
Explanation:

Deforestation is the removal of forest that can cause flooding. Coastal vegetation reduces the impact of waves and winds associated with a storm surge. Without this vegetation, coastal villages are susceptible to damaging floods. When trees are there, the roots are able to hold the soil and prevent erosion. When the roots are gone after deforestation, the soil can be errode and causes flood or other natural disasters.

Therefore, the correct answer is option C.

An ecologist wants to study the impact of habitat fragmentation on a forest ecosystem. Which of these would be the least impactful way to study the potential effect of habitat fragmentation while giving the most useful information? 

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

  1. Using a computer model to generate possible outcomes

  2. Observing a fragmented prairie ecosystem

  3. Deforesting an ecosystem and observing the effects

  4. Hypothesizing about what might be possible outcomes of fragmentation

  5. Experirmenting on a small patch of trees in a controlled area

Show answer
Correct Option: B
Explanation:
Effects of habitat fragmentation on forest ecosystem can be best studied in small and isolated populations. Prairie is a kind of dog. Prairie ecosystem is highly fragmented and effects of habitat fragmentation can't be studies easily in such fragmented ecosystems.
So, the correct answer is 'Observing a fragmented prairie ecosystem'.