Environmental Studies · General Awareness

Greenhouse Gases and Atmosphere

1,328 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

Which of the following is NOT a possible cause of global warming?

  1. increased levels of carbon dioxide in the atmosphere

  2. increase in greenhouse gases in the atmosphere

  3. decreased levels of carbon dioxide in the atmosphere

  4. increased air pollution from human activity
Reveal answer Fill a bubble to check yourself
C Correct answer
Explanation

Global warming is driven by the greenhouse effect, which is caused by an increase in greenhouse gases like carbon dioxide. Decreasing carbon dioxide levels would theoretically have the opposite effect.

Multiple choice

The greenhouse gas carbon dioxide helps to ___

  1. maintain warmth near Earth's surface

  2. increase precipitation in arid areas

  3. form clouds in the atmosphere

  4. deflect harmful radiation from space
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

Carbon dioxide is a greenhouse gas that traps infrared radiation emitted by the Earth, helping to maintain the planet's surface temperature at a level suitable for life.

Multiple choice

Which process helps reduce global warming?

  1. decay

  2. industrialization

  3. photosynthesis

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

Photosynthesis removes carbon dioxide from the atmosphere. Since carbon dioxide is a major greenhouse gas, this process helps mitigate global warming.

Multiple choice

Which of the following is not an example of a greenhouse gas?

  1. oxygen

  2. water vapor

  3. carbon dioxide

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

Oxygen makes up about 21 percent of the atmosphere but does not trap heat, so it is not a greenhouse gas. Water vapor, carbon dioxide, and methane are all potent greenhouse gases.

Multiple choice biology global environmental change causes of greenhouse effect greenhouse effect pollution and its effects

Which of the following is not a greenhouse gas?

  1. $N _2O$

  2. CFC
  3. $O _3$
  4. $SO _2$
Reveal answer Fill a bubble to check yourself
D Correct answer
Explanation

The gases which are transparent to solar radiation but retain and partially reflect back long wave heat radiations are called greenhouse gases. The various greenhouse gases are carbon dioxide, methane, chlorofluorocarbons and nitrous oxide. Other gases of minor significance are water vapour and ozone. Thus, the correct answer is option D.

Multiple choice biology global environmental change causes of greenhouse effect greenhouse effect pollution and its effects

Of the gases listed below, which is NOT believed to be responsible for enhancing the earth's greenhouse effect?

  1. Chlorofluorocarbons $(CFC _{s})$
  2. Molecular oxygen $(O _{2})$
  3. Nitrous oxide $(N _{2}O)$
  4. Carbon dioxide $(CO _{2})$
Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation

Greenhouse gases are those that absorb infrared radiation. Molecular oxygen (O2) and nitrogen (N2) are symmetric diatomic molecules and do not absorb infrared radiation, so they do not contribute to the greenhouse effect.

Multiple choice biology global environmental change causes of greenhouse effect greenhouse effect pollution and its effects

The atmospheric greenhouse effect is produced mainly by the:

  1. Absorption and re-emission of visible light by the atmosphere

  2. Absorption and re-emission of ultraviolet radiation by the atmosphere

  3. Absorption and re-emission of infrared radiation by the atmosphere

  4. Absorption and re-emission of visible light by clouds
Reveal answer Fill a bubble to check yourself
C Correct answer
Explanation

The greenhouse effect occurs because greenhouse gases in the atmosphere absorb outgoing infrared radiation (heat) from the Earth's surface and re-emit it, trapping the energy.

Multiple choice biology global environmental change causes of greenhouse effect greenhouse effect pollution and its effects

Which one of the following is the correct percentage of the two (out of the total of 4) green house gases that contribute to the total global warming?

  1. CFCs 14%, Methane 20%

  2. CFCs 20%, Methane 14%
  3. N$ _2$O 6%, CO$ _2$ 86%
  4. Methane 20%, N$ _2$O 18%
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

Greenhouse effect increases the temperature of the earth.The gases responsible for greenhouse traps the infrared radiations which lead to heating of the earth's surface. The primary greenhouse gases in earth's atmosphere are water vapour, carbon dioxide, methane, nitrous oxide, and ozone. The 

Composition of greenhouse gases are 
CO$ _2$- 56% 
CFCs -14%, 
Methane - 20% 
Nitrous Oxides - 8%, 
Water Vapours - 2%. 
Therefore, the correct answer is option A.

Multiple choice biology global environmental change causes of greenhouse effect greenhouse effect pollution and its effects

Greenhouse effect is mainly due to 

  1. $SO _2$
  2. $CO _2$

  3. CO
  4. $O _2$
Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation

When the solar radiation falls on earth surface heating it, a small proportion is reflected back. Earth's surface re-emits heat in the form of infrared radiation but part of this does not escape into space as atmospheric gases (e.g., carbon dioxide, methane, etc.) absorb a major fraction of it is called as greenhouse effects. The molecules of these gases absorb solar energy and increase the earth's temperature and these gases are called as greenhouse gases. Thus, the correct answer is option B.