Tag: human influences on the environment

Questions Related to human influences on the environment

Smog is formed when fog is mixed with _______

zoology human influences on the environment acid rain air pollution - effects and control air pollution and its effects

  1. Sulphur

  2. Mercury

  3. Smoke

  4. Snow flakes

Show answer
Correct Option: C
Explanation:

Smog is formed when fog is mixed with smoke. The presence of unburnt hydrocarbons in air when mixed with condensed water vapour forms a thick layer called smog. It lowers the visibility during winters and is an indication of air pollution.

Smog is _____

zoology human influences on the environment acid rain air pollution - effects and control air pollution and its effects

  1. Smkoe

  2. Fog

  3. Both A and B

  4. None of these

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Correct Option: C
Explanation:

Smoke released from various sources may get mixed with dust particles and small drops of fog to produce what is called smog.

The combination of nitrogen oxides and hydrocarbons in the presence of the sunlight causes

zoology human influences on the environment acid rain air pollution - effects and control air pollution and its effects

  1. Global warming

  2. Smog

  3. Ozone hole in the atmosphere

  4. Acid rain

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Correct Option: B

Cement factory labourers are prone to

zoology human influences on the environment acid rain air pollution - effects and control air pollution and its effects

  1. Leukemia

  2. Bone-marrow diseases

  3. Asbestosis

  4. Cytosilicosis

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Correct Option: D

Chemically, reducing high levels of sulfur dioxide is known as:

zoology human influences on the environment acid rain air pollution - effects and control air pollution and its effects

  1. Reducing smog

  2. Enhanced Smoke

  3. Smog

  4. smoke

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Correct Option: A

Smog can be harmful for:

zoology human influences on the environment acid rain air pollution - effects and control air pollution and its effects

  1. Respiratory tract

  2. Urinary tract

  3. Digestive tract

  4. Spinocerebellar tract

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Correct Option: A

All are physical pollutants except

zoology human influences on the environment acid rain air pollution - effects and control air pollution and its effects

  1. heat

  2. sound

  3. radiations

  4. soot

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Correct Option: D

Greenhouse effect is due to

zoology human influences on the environment carbon cycle ozone layer depletion and causes depletion of ozone layer

  1. accumulation of $ { O } _{ 3 } $ and depletion of $ { CO } _{ 2 } $

  2. accumulation of both $ { O } _{ 3 } $ and $ { CO } _{ 2 } $

  3. accumulation of $ { CO } _{ 2 } $ and depletion of $ { O } _{ 3 } $

  4. presence of green plants on the Earth.

Show answer
Correct Option: C
Explanation:
Greenhouse effect, a warming of Earth’s surface and troposphere (the lowest layer of the atmosphere) is caused by the presence of water vapour, carbon dioxide, methane, and certain other gases in the air. Of those gases, known as greenhouse gases, water vapour has the largest effect. The atmosphere allows most of the visible light from the Sun to pass through and reach Earth’s surface. As Earth’s surface is heated by sunlight, it radiates part of this energy back toward space as infrared radiation. This radiation, unlike visible light, tends to be absorbed by the greenhouse gases in the atmosphere, raising its temperature. The heated atmosphere in turn radiates infrared radiation back toward Earth’s surface. 
So the correct option is 'accumulation of CO$ _2$ and depletion of O$ _3$'.

Read the given statements and select the correct option.


Statement 1: The average temperature of Earth has increased by $ 0.6 $ during the past century.
Statement 2: There has been a progressive increase in the use of fossil fuels generating more greenhouse gases.

zoology human influences on the environment carbon cycle ozone layer depletion and causes depletion of ozone layer

  1. Both statements 1 and 2 are correct.

  2. Statement 1 is correct but statement 2 is incorrect.

  3. Statement 1 is incorrect but statement 2 is correct.

  4. Both statements 1 and 2 are incorrect.

Show answer
Correct Option: A
Explanation:

The various greenhouse gases are $ { CO } _{ 2 }, { CH } _{ 4 }, { CFC } _{ s } $ and $ { N } _{ 2 }{ O } $. Excessive use of fossil fuel is adding more $ { CO } _{ 2 } $ to atmosphere. This increase in concentration of greenhouse gases has led to considerable heating of earth leading to global warming. During the pas century, the temperature of earth has increased by $ 0.6 $.

Which of the following is a green house gas?

zoology human influences on the environment carbon cycle ozone layer depletion and causes depletion of ozone layer

  1. Methane

  2. CO

  3. Water vapour

  4. Oxygen

Show answer
Correct Option: A
Explanation:
The warming of earth's surface when sun radiations are absorbed and trapped in earth's atmosphere, is called greenhouse effect. The gases responsible for green house effect are called green house gases which trap the radiations and don't let them reflect back from the earth's surface. The green house gases are Chlorofluorocarbons (CFCs), Carbon dioxide (CO2), Methane (CH4) and Nitrous Oxide (N2O). 
So, the correct answer is 'Methane'.