Environmental Studies · General Awareness

Greenhouse Gases and Atmosphere

1,262 Questions

Review important questions related to greenhouse gases, global warming, and atmospheric changes. The practice set focuses on identifying major pollutants and their environmental impact. These concepts are tested in the general awareness and environmental studies sections.

Greenhouse gas identificationGlobal warming processAtmospheric carbon dioxideMethane emissionsCement production emissions

Greenhouse Gases and Atmosphere Questions

Multiple choice biology natural disasters: winds, storms and cyclones composition of air introduction to air natural resources - air

The third most abundant gas in Earth's atmosphere is:

  1. carbon

  2. nitrogen

  3. oxygen

  4. argon
Reveal answer Fill a bubble to check yourself
D Correct answer
Explanation

The atmosphere contains many gases, including some pollutants and greenhouse gases. The most abundant gas in the atmosphere is nitrogen, second oxygen . Argon, an inert gas, is the third most abundant gas in the atmosphere.

Multiple choice geography atmosphere and temperature atmosphere and its structures what is around us? the atmosphere

Greenhouse effect is a term associated with interrelationship of different cultural ties and political movements over the world.

  1. True

  2. False
Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation

The greenhouse effect is not a term associated with the interrelationship of different cultural ties and political movements over the world. It is a term associated with pollution.

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

Greenhouse effect is due to

  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.
Reveal answer Fill a bubble to check yourself
C Correct answer
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$'.

Multiple choice zoology physical resources carbon cycle ozone layer depletion and causes depletion of ozone layer

Correct percentage of two green house gases is

  1. $N _2O-6\%, CO _2-86\%$
  2. $CH _4-20\%, N _2O-18\%$
  3. $CO _2-40\%, CFC-30\%$
  4. $CFC-14\%, CH _4-20\%$
Reveal answer Fill a bubble to check yourself
D Correct answer
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 (CFC's), Carbon dioxide (CO2), Methane (CH4) and Nitrous Oxide (N2O). 
The approximate percentage of different greenhouse gases in the atmosphere is:
CFCs - 14%
CO2 - 60%
‎CH4 - 20%
N2O - 6%
So, the correct answer is 'CFC−14%, CH4 - 20%

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

Which of the following is a green house gas?

  1. Methane

  2. CO

  3. Water vapour

  4. Oxygen
Reveal answer Fill a bubble to check yourself
A Correct answer
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'.
Multiple choice zoology human influences on the environment carbon cycle ozone layer depletion and causes depletion of ozone layer

Carbon dioxide is called a green house gas because

  1. It emits light

  2. It traps infra red radiations

  3. It traps ultraviolet radiations

  4. It is involved in photosynthesis
Reveal answer Fill a bubble to check yourself
B Correct answer
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. Carbon dioxide traps the infra red radiations and accounts for greatest contribution to greenhouse effect.
So, the correct answer is 'It traps infra red radiations'.
Multiple choice zoology human influences on the environment carbon cycle ozone layer depletion and causes depletion of ozone layer

Which greenhouse gas contributes 20% to global warming?

  1. Methane
  2. N$ _2$O

  3. CFCs
  4. CO$ _2$
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation
he 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 (CFC's), Carbon dioxide (CO2), Methane (CH4) and Nitrous Oxide (N2O). 
The approximate percentage of different greenhouse gases in the atmosphere is:
CFCs - 14%
CO2 - 60%
‎CH4 - 20%
N2O - 6%
So, the correct answer is 'Methane'.
Multiple choice zoology human influences on the environment carbon cycle ozone layer depletion and causes depletion of ozone layer

Gases commonly referred as green house gases are :

  1. $CH _4$
  2. $CO _2$

  3. CFC
  4. $NH _3$
Reveal answer Fill a bubble to check yourself
A,B,C Correct answer
Explanation
Greenhouse gases absorbs radiations from sun that are reflected back from earth's surface. In this way, they prevent the radiations from escaping. These gases can cause greenhouse effect in which there is warming of earth's surface. Gases like methane (CH4), carbon dioxide (CO2), CFC (Chlorofluorocarbon) and Nitrous oxide (N2O) are greenhouse gases. Excess concentration of greenhouse gases in atmosphere can cause global warming.
So, the correct answer is options 'A, B and C'. 
Multiple choice zoology human influences on the environment carbon cycle ozone layer depletion and causes depletion of ozone layer

The main green house gas is

  1. Ozone

  2. Oxygen

  3. Helium

  4. Cardon dioxide
Reveal answer Fill a bubble to check yourself
D Correct answer
Explanation

Greenhouse gases are the gases that contribute to the greenhouse effect by absorbing the earth's heat and re-radiating it towards the earth. Carbon dioxide is the highest (among gases) contributor towards greenhouse effect and contributes about 9-26%, followed by methane (contributes 4-9%), and ozone (3-7%). Over the past few years, carbon dioxide has caused most of the global warming as it is present in abundance in the atmosphere and its amount is increasing over the years. So, even though other gases have a more contributing effect per molecule, the amount of carbon dioxide is so high that it contributes more than the other gases. Due to this carbon dioxide is considered the main greenhouse gas. 

Thus, the correct answer is 'Carbon dioxide.' 

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

The true statement about 'Green -house effect' is that it is

  1. Caused by combination of many gases
  2. Caused only by $CO _2$
  3. Caused by $CO _2,CFC,CH _4$ and $NO _2$ gases

  4. None of the above
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation
Greenhouse effect is the phenomenon in which radiations from the sun are trapped in the earth's surface and this causes the warming of surface and increase in temperature of earth. Various gases such as carbon dioxide and carbon monoxide trap the heat radiations that enter the earth's surface and promotes greenhouse effect. Such gases are called greenhouse gases. Approximate contribution of different gases to greenhouse effect is as follows:
  • Carbon dioxide (CO2)- 60%
  • Methane (CH4)- 20%
  • Chlorofluorocarbons (CFC)- 14%
  • Nitrous oxide (N2O)- 6%
Hence, greenhouse effect is caused by combination of many gases.
So, the correct answer is 'Caused by combination of many gases'.