Tag: evs - i

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Questions Related to evs - i

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

Decrease in species diversity in tropical countries is mainly due to

  1. Urbanisation

  2. Pollutionx

  3. Deforestation

  4. Soil erosion
Reveal answer Fill a bubble to check yourself
C Correct answer
Explanation

When there are no more individuals of a species (plant or animal) alive anywhere in the world, the species is said to be extinct. A decrease in the species diversity progresses to extinction if left uncontrolled. Extinction is also known as the process of dying out. The process is a completely natural part of evolution. But sometimes extinctions happen at a higher and a faster rate than usual. Factors such as large body size, small population, massive habitat loss and position at a higher trophic level favor extinction. As forests are the main habitat for the wild animals, their loss favors the extinction of the same.

So, the correct answer is 'Deforestation'.

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

Choose the wrong pair

  1. Salvodora - Desert

  2. Cenchrus - Savanna

  3. Ables - Coniferous forest

  4. Quercus - Broad leaf forest

  5. Tectona - Temperate forest
Reveal answer Fill a bubble to check yourself
E Correct answer
Explanation

Tectona (teak) is a tropical tree genus native to South and Southeast Asia. It does not naturally grow in temperate forests, making this pairing incorrect.

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

Main cause of extinction of species from tropical areas is

  1. Afforestation

  2. Deforestation

  3. Pollution

  4. Soil erosion
Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation

When there are no more individuals of a species (plant or animal) alive anywhere in the world, the species is said to be extinct. Extinction is also known as the process of dying out. The process is a completely natural part of evolution. But sometimes extinctions happen at a higher and a faster rate than usual. Factors such as large body size, habitat loss, small population and position at a higher trophic level favor extinction. Since the species residing in the tropics have their major habitat in the form of forests, thus deforestation causes, extinction of such species.

So, the correct answer is 'Deforestation'.

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

Extensive plating of trees to increase forest cover is called :

  1. Afforestation

  2. Agroforestry

  3. Deforestation

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

Afforestation is the process of planting trees in an area that did not previously have forest cover or has been cleared for a long time. It is a key strategy for increasing forest cover.

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

Deforestation does not cause ...........

  1. Desertification

  2. Global warming

  3. Drought

  4. Forest fires
Reveal answer Fill a bubble to check yourself
D Correct answer
Explanation

Since deforestation means cutting down of trees. So, it will result in desertification of an area, global warming because of increase in CO$ _2$ in the environment since plants are not available to fix it by photosynthesis, and can cause drought because of imbalance in water cycle of an area. But, deforestation will never cause forest fires because the forests are not available to catch the fire as they are being cut down in case of deforestation.

So, the correct answer is 'Forest fire'.

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

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

  1. Pyrolysis

  2. Jhum

  3. Taungya system

  4. Shift cultivation
Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation

Jhum is the traditional name for slash-and-burn agriculture practiced in Northeast India, where trees are cut, burned, and crops are grown using the nutrient-rich ash.

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

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

  1. Scarcity of food

  2. Over crowding

  3. Hunting

  4. Deforestation
Reveal answer Fill a bubble to check yourself
D Correct answer
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'

Multiple choice evs - i rules are for everyone damaging the forests deforestation and afforestation protecting our environment sustainability of natural resources adaptations - mangrove swamps, fast flowing rivers and treetops halophiles pollution of soil degradation of land

Which method is most effective in controlling floods?

  1. Digging deep canals

  2. Reforestation

  3. Deforestation

  4. Constructing dams
Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation

Loss of vegetation (deforestation) results in an increased risk of flooding. With natural forest cover, the flood duration should decrease. Reducing the rate of deforestation should improve the incidents and severity of floods. Reforestation and afforestation are two strategies to increase the vegetation cover, that can improve infiltration and interception rates, and thus regulate flood peaks. Reforestation refers to planting trees in areas, where they have been cut down, while afforestation means planting trees, where they have never existed. Dams and reservoirs are effective in controlling floods by reducing peak flows. 

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

An effect of deforestation is

  1. Desertification

  2. Soil erosion and floods

  3. Depletion of wildlife

  4. All of the above
Reveal answer Fill a bubble to check yourself
D Correct answer
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.

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

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

  1. Increase the risk of floods and droughts

  2. Global warming

  3. Both A and B

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