Tag: protecting our environment

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Questions Related to protecting our environment

Multiple choice commercial studies striving for a better environment soil and its conservations soil pollution-control protecting our environment

Which of the following may increase the fertility of soil?

  1. Vermicompost

  2. Manure

  3. Industrial waste

  4. Both A and B
Reveal answer Fill a bubble to check yourself
D Correct answer
Explanation

Vermicomposting is a method in which earthworms are used to convert the organic wastes into compost, which is a good fertilizer for plants. It increases the soil fertility. Manure is the organic matter mainly animal feces and straw. It adds nutrients (nitrogen) in the soil, which increases the soil fertility. So, the correct option is D.

Multiple choice evs - i rules are for everyone soil and its conservations soil pollution-control protecting our environment sustainability of natural resources adaptations - mangrove swamps, fast flowing rivers and treetops halophiles

In hilly areas, erosion is minimized by

  1. Terracing

  2. Manuring

  3. Ploughing

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

Soil erosion is removal of top soil by agency of water (water erosion) and wind (wind erosion). One of the methods for soil conservation against soil erosion is terracing. In terracing, slope is divided into a number of flat fields for slowing down the flow of water. Terracing is very effective in hilly areas for control of soil erosion.

Multiple choice evs - i rules are for everyone soil and its conservations soil pollution-control protecting our environment sustainability of natural resources adaptations - mangrove swamps, fast flowing rivers and treetops halophiles

Soil erosion can be prevented by

  1. Overgrazing

  2. Removal of vegetation

  3. Afforestation

  4. Increasing birds population
Reveal answer Fill a bubble to check yourself
C Correct answer
Explanation
Soil erosion can be prevented by afforestation and reforestation. Reforestation is restoration of forests, which have been destroyed by deforestation, while afforestation is planting of new forests. Plants hold soil with there roots and thus prevent erosion.
So, the correct answer is 'Afforestation'
Multiple choice commercial studies striving for a better environment soil and its conservations soil pollution-control protecting our environment

Soil conservation can be best achieved by having a

  1. Wind screens

  2. Good plant cover

  3. Restricted human activity

  4. Low rainfall
Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation

Anthropogenic soil erosion is caused by removal of plant cover through over grazing, litter collection, tree felling, leaving the soil unprotected during agricultural operations. Anthropogenic factors remove green cover and expose the soil to natural agents of soil erosion i.e., water and wind. When rains fall, most of the top layer of soil is washed away, if the soil is not covered by vegetation. 

Conservation of soil can best be achieved through good green cover over soil.

Multiple choice commercial studies striving for a better environment soil and its conservations soil pollution-control protecting our environment

Which of the following can be considered as soil pollutants?

  1. Fertilizers

  2. Pesticides

  3. Weedicides

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

Soil pollution is caused by removal or addition of substances which decrease its productivity. It is caused by agrochemicals, industrial wastes, municipal wastes etc. It adversely affects the fertility of the soil. Pesticides, weedicides, and fertilizers are added to soil in agriculture practices to remove unwanted plants and increase the fertility of the soil. These chemicals penetrate into soil and damages the soil.

Thus, the correct answer is option D.

Multiple choice commercial studies striving for a better environment soil and its conservations soil pollution-control protecting our environment

Soil salinization is common in semi-arid region because

  1. Soil erosion occurs very frequently

  2. Leaching is not adequate

  3. Dense microbial flora

  4. All of the above
Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation
Soil salinization is the process of increasing the salt content in the soil. It is common in semi-arid regions because of inadequate leaching which leads to accumulation of salt below the root zone leading to salinization.
So, the correct answer is option B.
Multiple choice evs - i the environment and us soil and its conservations soil pollution-control protecting our environment

Soil pollution can lead to water pollution

  1. True

  2. False
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation
  • The contamination of soil with solid waste, acid rain excess of fertilizers, Insecticides, and herbicides is called soil pollution.
  • Soil pollution can lead to water pollution if toxic chemicals leach(drain away from the soil) into groundwater, or if contaminated runoff reaches streams, lakes, or oceans.
  • Hence Soil pollution can lead to water pollution is a true statement.
  • So, the correct answer is 'True'.
Multiple choice evs - i rules are for everyone soil and its conservations soil pollution-control protecting our environment sustainability of natural resources adaptations - mangrove swamps, fast flowing rivers and treetops halophiles

Mulching is helpful in

  1. Increasing soil fertility

  2. Improvement of soil structure

  3. Moisture conservation

  4. Better crops
Reveal answer Fill a bubble to check yourself
C Correct answer
Explanation

Mulching refers to the covering of harvested field with plant litter or polythene of low density, in order to decrease run off, prevent the growth of weeds and retention of water. It protects the roots from seasonal variations.During initial stages of growth, mulching helps to maintain a stable temperature for proliferation of seedling.

Multiple choice commercial studies striving for a better environment soil and its conservations soil pollution-control protecting our environment

Which of the following prevents soil erosion?

  1. Allowing herbivorous animals to graze excessively.

  2. Growing plants to form a soil cover.

  3. Increasing fertility of the soil.

  4. Making the land slopy.
Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation

When trees are cut on a large scale land becomes barren. This results in the loss of upper soil layer due to heavy wind or flowing water leading to soil erosion. Roots of plants hold the soil particles and prevent their loss. Hence afforestation i.e. growing plants to form a soil cover prevents soil erosion. Thus the correct answer is option B.

Multiple choice evs - i rules are for everyone soil and its conservations soil pollution-control protecting our environment sustainability of natural resources adaptations - mangrove swamps, fast flowing rivers and treetops halophiles

Soil conservation is achieved through

  1. Restricted human activities

  2. Good plant cover

  3. Wind screen

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

Soil erosion is removal of top soil by agency of water (water erosion) and wind (wind erosion). Soil erosion is of two types- natural and anthropogenic. 

Natural or geological erosion is extremely slow removal of top soil due to rain water or wind. 
Anthropogenic soil erosion is caused by removal of plant cover through over grazing, tree felling, leaving the soil unprotected during agricultural operations. 
Thus, soil conservation can be achieved through good plant cover.