Tag: the environment and us

Questions Related to the environment and us

Concentration of green house gases is increasing due to

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

  1. Deforestation

  2. Increased use of refrigerators

  3. Increased combustion of coal and petroleum

  4. All of the above

Show answer
Correct Option: D
Explanation:

The greenhouse gases are capable of trapping and reflecting the sun's radiations on the earth's surface. Examples include carbon dioxide, methane, nitrous oxides etc. These are naturally released by activities like volcanic eruptions, forest fires, respiration etc. But their increased levels have occurred due to the anthropogenic activities like deforestation, increased use of refrigerators (releasing CFCs) and increased combustion of coal and petroleum (releasing oxides of nitrogen, sulphur and carbon). Because of the increase in their levels, they have caused climate change by global warming.

Hence, the correct answer is 'All of the above'.

A successful forest conservation strategy should involve

evs - i the environment and us damaging the forests deforestation and afforestation protecting our environment

  1. protection of animals at the highest trophic level

  2. protection of only sonsumers

  3. protection of only herbivores

  4. comprehensive programme to protect all the physical and biological components

Show answer
Correct Option: D

Many marine animals use carbonates dissolved in sea-water to make their shells. Which of the following component is reduced in our atmosphere by this biological phenomenon?

business organisation and correspondence environmental pollution and industries air pollution and its effects the environment and us environment and conservation

  1. Oxygen

  2. Calcium carbonate

  3. Carbon dioxide

  4. Nitrogen

Show answer
Correct Option: C
Explanation:

Shell of many marine organism are made of calcium carbonate. Carbonate is formed when carbon dioxide (CO2) from atmosphere get react with the sea water. It also help us to maintain carbon dioxide level in the atmosphere because today scenario is very alarming due to increasing level of carbon dioxide. 

So, the correct option is 'Carbon dioxide'.

Major causes of air pollution are:

business organisation and correspondence environmental pollution and industries air pollution and its effects the environment and us environment and conservation

  1. Combustion of natural gas, coal, petroleum

  2. Welding, stone crushing, agriculture burning

  3. Both A and B

  4. None of the above

Show answer
Correct Option: C
Explanation:

Major causes of air pollution are combustion of natural gas, coal, petroleum, automobiles, aircraft, railways, thermal plants, welding, stone crushing and agriculture burning

So, the correct answer is 'Both A and B'

Which of the following pollution involves eutrophication?

evs - i the environment and us air pollution and its effects environment and conservation environmental pollution and industries threatened species need of conservation conservation of soil and wild life

  1. Water pollution

  2. Noise pollution

  3. Air pollution

  4. None of the above

Show answer
Correct Option: A
Explanation:
 Eutrophication is when a water body is induced by unnecessary growth of algae. Eutrophication results in declining the quality of water and in reducing dissolved oxygen in water bodies. Eutrophication is divided into two types - natural and cultural. 
Example, addition of excessive fertilizers to the fields will lead to their accumulation into a nearby water body during run-offs
So, the correct answer is 'Water pollution'

The direct discharge of pollutants into water bodies leads to

evs - i the environment and us air pollution and its effects environment and conservation environmental pollution and industries threatened species need of conservation conservation of soil and wild life

  1. Water pollution

  2. Soil pollution

  3. Air pollution

  4. All of the above

Show answer
Correct Option: A
Explanation:

Water pollution is the mixing of contaminants to the water bodies (e.g., lakes, rivers, oceans, aquifers and groundwater) which changes the desired quality of water. Water pollution affects the entire biosphere, plants and organisms living in these bodies of water.

Water pollution causes damage to the

evs - i the environment and us air pollution and its effects environment and conservation environmental pollution and industries threatened species need of conservation conservation of soil and wild life

  1. Humans only

  2. Entire ecosystem

  3. Plants only

  4. None of the above

Show answer
Correct Option: B
Explanation:

Water pollution affects the entire biosphere, plants and organisms as all the life forms depend on water for their survival. In almost all cases, the effect is damaging not only to individual species and population but also to the natural biological communities. 

The unfavourable alteration of environment due to human activities is termed as

business organisation and correspondence environmental pollution and industries air pollution and its effects the environment and us environment and conservation

  1. Ecological disturbance

  2. Catastrophe

  3. Ecological degradation

  4. Pollution

Show answer
Correct Option: D
Explanation:

Pollution is the addition of contaminants into the natural environment that can cause undesirable change. It may be the chemical and physical change. Pollutants are the contaminants that cause pollution.

So, the correct answer is option D.

Fine organic or inorganic particles suspended in air is called as

business organisation and correspondence environmental pollution and industries air pollution and its effects the environment and us environment and conservation

  1. Particulate pollutant

  2. Gaseous pollutant

  3. Aerosol

  4. None of the above

Show answer
Correct Option: C
Explanation:

Fine organic or inorganic particles suspended in air is called as aerosol particulate matter. It consists of soot, flash, and dust of various types, fur, hair, spores etc. It is classified into settleable and suspended particulate matter.

Which of the following is not a pollutant?

business organisation and correspondence environmental pollution and industries air pollution and its effects the environment and us environment and conservation

  1. $SO _2$

  2. $CO _2$

  3. CO

  4. $NO _2$

Show answer
Correct Option: B
Explanation:

Carbon dioxide is described as pollutant or not a pollutant depending on the source of emission. The carbon dioxide which is released from the plants and animals as the end product of the respiration is not considered as a pollutant. The carbon dioxide gas which is released as the exhausts and emissions from the industries causes pollution and are referred as a pollutant. The main role of the gas is in increasing the temperature of Earth and so these are not pollutants. 

Thus, the correct answer is option B.