Tag: afforestation

Quizzes (0) Questions (44)

Questions Related to afforestation

Multiple choice evs - i forests: our lifeline afforestation deforestation and its effect deforestation

Decrease in tropical forests during the past century was

  1. 40%

  2. 50%

  3. 60%

  4. 10%
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation
Tropical rainforests occur in areas of tropical regions in which there is no dry season – all months have average precipitation of at least 60 mm. During early times it use to cover  40% of the forest land now this number is affected by the deforestation.
So, the correct answer is '40%'
Multiple choice evs - i forests: our lifeline afforestation deforestation and its effect deforestation

Waldsterben is

  1. Decline in forests

  2. Development of fog

  3. Harm to sculptures, statues and buildings

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

Waldsterben refers to the mass death of the trees wherein, the peripheral parts of the plants are killed and slowly the entire forest population dwindles. It was first reported in Germany in the early 1980s. The atmospheric pollution was the main cause of such deaths of trees. Tropospheric ozone is the secondary pollutant. Nitrogen oxides and sulphur oxides are released by the industrial emissions and vehicular exhausts. Acid rain is the chemical reaction between these oxides and water to form their respective acids that precipitate with the rains. The pollutants have severe effects on the trees.

Hence, the correct answer is 'Decline in forests'.

Multiple choice evs - i forests: our lifeline afforestation deforestation and its effect deforestation

What is deforestation?

  1. Clearing of forests

  2. Planting of more trees

  3. Grazing of animals in forest area

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

Deforestation is excessive cutting of the trees. it clears the land area which can cause the floods or may lead to infertility of the land. The most dramatic impact is a loss of habitat for millions of species. Seventy percent of Earth's land animals and plants live in forests, and many cannot survive the deforestation that destroys their homes.

So, the correct answer is option A.

Multiple choice zoology forests: our lifeline afforestation deforestation and its effect deforestation

Deforestation leads to the increased percentage of which of the following components of the environment?

  1. Carbon dioxide

  2. Nitrogen

  3. Oxygen

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

Deforestation leads to the increased percentage of carbon dioxide components of the environment because trees provide oxygen by taking up carbon dioxide when their number reduces the carbon dioxide was unable to be converted into oxygen. That's why its components increases.

Multiple choice zoology forests: our lifeline afforestation deforestation and its effect deforestation

Which of the following helps the soil to prevent the flood?

  1. Forest

  2. Animals

  3. Fishes

  4. None of the above
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation
  • Trees help keep soil in place by holding a large amount of soil with there roots.
  • Without trees, rain runs off soil into rivers and streams, raising the water level which leads to floods.
  • Planting trees acts to shield soil from the winds, and the mulch from fallen leaves forms a layer to protect the soil on the "forest" floor.
  • Hence the forest helps the soil to prevent the flood.
  • So, the correct answer is 'Forest'.