Tag: protecting our environment

Questions Related to protecting our environment

What is / are the likely consequences of deforestation?

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

  1. Carbon dioxide in the air increases.

  2. Destruction of habitats takes place.

  3. Mineral salts in the soil are washed away.

  4. All of the above.

Show answer
Correct Option: D
Explanation:

Deforestation is the depletion / destruction of forest resources. Its main cause is the explosion of human and livestock population with the increased demand of the basic needs. The major effect of deforestation is the loss of precious wildlife, rare species of flora and fauna due to loss of habitat, soil erosion, accentuated floods, drought, pollution and increased level of carbon dioxide.

Deforestation is caused due to

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

  1. grazing

  2. timber

  3. Cultivation

  4. all of these

Show answer
Correct Option: D

What is the effect of deforestation on amount of $CO _2$ in atmosphere?

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

  1. It increases

  2. It decreases

  3. It remains unchanged

  4. Cannot be predicted

Show answer
Correct Option: A
Explanation:

Deforestation is the permanent destruction of forests in order to make the land available for other uses. Deforestation has many negative effects on the environment. 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. Deforestation also drives climate change. Since, trees purify air by absorbing carbon dioxide from atmosphere, loss of trees would result into increase in level of carbon dioxide.

Deforestation refers to

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

  1. planting of trees

  2. cultivation of crops

  3. disappearance of forests

  4. development of plantation

Show answer
Correct Option: C

Most fertile layer of soil is

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

  1. top layer

  2. organic layer

  3. middle soil layer

  4. all of these

Show answer
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

Show answer
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

Show answer
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

Show answer
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

Show answer
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. $N _2$

Show answer
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.