Environmental Studies · Geography

Atmospheric Structure and Ozone

1,319 Questions

Atmospheric structure and ozone layer topics examine the Earth's atmospheric layers, the impact of solar radiation, and ozone depletion mechanisms. These environmental science concepts are crucial for general awareness sections in multiple competitive examinations. Review these questions to solidify your understanding of the stratosphere, polar vortex effects, and greenhouse gases.

Earth's atmospheric layersOzone layer depletionSolar ultraviolet radiationPolar vortex effectsCarbon dioxide impactOzone-depleting substances

Atmospheric Structure and Ozone Questions

Multiple choice evs - ii our earth and our solar system solar system and sun planets and stars introduction to solar system planets sunita's experience in space space exploration

There is life on Earth because of:

  1. optimum sunlight

  2. presence of water and atmosphere

  3. presence of ozone layer

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

Earth is at an optimum distance from the Sun, therefore the sunlight reaching the Earth is not extremely hot. Also, the ozone layer prevents the entry of harmful rays. Presence of water and atmosphere that are essential for life an Earth to grow.

Multiple choice botany environmental factors soil-nature climate factors abiotic components

What does help in reaeration from atmosphere?

  1. Turbidity

  2. Sunlight

  3. Oxygen

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

Reaeration is the process by which oxygen is replenished in water. Turbulence (often described as turbidity or agitation) increases the surface area contact between air and water, facilitating oxygen transfer.

Multiple choice zoology environmental factors soil-nature climate factors abiotic components organisms and environment

Scientists are able to determine the air temperature in the thermosphere by:

  1. Using radiosondes

  2. Using temperature probes in orbiting satellites

  3. Observing changes in satellite orbits

  4. Direct measurements in manned, high-altitude balloons
Reveal answer Fill a bubble to check yourself
C Correct answer
Explanation

The thermosphere is too high for balloons and radiosondes, and satellites orbit within it, making direct temperature probes difficult due to the low density of air. Scientists instead infer the temperature by observing the drag effects on satellite orbits, which are directly influenced by the density and temperature of the thermosphere.

Multiple choice economics environment pollution international efforts for conserving biodiversity effects of pollution on environment government efforts in pollution control

Montreal Protocol was connected with

  1. Phasing out ODS

  2. Reduction in CFCs

  3. Replacing CFCs with Chlorine and Bromine

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

Montreal Protocol on substances that deplete the Ozone layer was signed in 1987 and was adopted in 1989 as a protocol to the Vienna convention. Till 2016, it sought to control HCFCs and CFCs. The Kigali amendment of 2016 added HFCs under the ambit of the Montreal Protocol. Initially, the protocol was designed to reduce the production of CFCs and Halons. Later 

CCl$ _{4}$, Trichloroethane and Methyl Bromide were included.
Hence, the correct answer is 'Reduction in CFCs.'

Multiple choice economics environment pollution international efforts for conserving biodiversity effects of pollution on environment government efforts in pollution control

Number of ozone depleters identified by Montreal Protocol (1987) was

  1. 12

  2. 8

  3. 6

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

The Montreal Protocol on Substances that Deplete the Ozone, 1987 was meant to protect the ozone depletion by gradually phasing out the major ozone depleting substances. This protocol was signed to the Vienna Convention and identifies the following as ODS:

  1. CFCs
  2. Halons
  3. CCl$ _{4}$
  4. HCFCs
  5. HBFCs
  6. CH$ _{3}$Br
  7. CH$ _{2}$BrCl
  8. HFCs.

Hence, the correct answer is '8' 

Multiple choice economics environment pollution international efforts for conserving biodiversity effects of pollution on environment government efforts in pollution control

The Ozone Day is observed every year on September 16 as on this day in 1987 the ___________ was signed for launching efforts to arrest the depletion of the fragile ozone layer in the stratosphere that prevents the harmful ultra-violet rays of the sun from reaching the earth. Fill the correct word in blank.

  1. Montreal Protocol

  2. Geneva Protocol

  3. Kyoto Protocol

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

September 16 is observed as the International Day for the Preservation of the Ozone Layer, commemorating the date in 1987 when the Montreal Protocol was signed.

Multiple choice economics environment pollution international efforts for conserving biodiversity effects of pollution on environment government efforts in pollution control

According to scientists, CFCs are supposed to last for more than 100 years, in

  1. Biosphere

  2. Stratosphere

  3. Troposphere

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

CFCs are chemically inert in the lower atmosphere (troposphere), allowing them to drift up into the stratosphere, where they are broken down by UV radiation, releasing chlorine atoms that deplete the ozone layer. Their long atmospheric lifetime is a key reason for their environmental impact.

Multiple choice economics environment pollution international efforts for conserving biodiversity effects of pollution on environment government efforts in pollution control

CFCs can destroy;

  1. 100, 000 ozone molecules

  2. 1000 ozone molecule

  3. 10, 000 ozone molecules

  4. 20, 000 ozone molecules
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

A single molecule of chlorofluorocarbon (CFC) can persist in the stratosphere and catalytically destroy up to 100,000 ozone molecules through continuous chlorine radical chain reactions.

Multiple choice our life and environment geography

Ozone is a photochemical oxidant emitted directly from combustion sources.

  1. True

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

Ozone is a secondary pollutant formed in the atmosphere through photochemical reactions involving sunlight, nitrogen oxides, and volatile organic compounds, rather than being emitted directly from combustion sources.

Multiple choice evs - i what is around us? atmosphere and its structures the atmosphere components of earth elements of weather and climate : temperature the earth's structure
The most important layer of atmosphere is ___________.

  1. Troposphere

  2. Thermosphere

  3. Mesosphere

  4. None of these
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

The layer of atmosphere near the surface of the earth or the lower-most one is called the troposphere. The average thickness of this layer is about 14 km. Most of the weather forming phenomena occur in this layer. The significance of this layer is very crucial for the earth. It is the most important layer of the atmosphere. 

Multiple choice geography what is around us? atmosphere and its structures the atmosphere components of earth elements of weather and climate : temperature the earth's structure

The lowest layer of the atmosphere called troposphere, which varies from $4$ to $5$ miles in depth at the poles to approximately $10$ miles at the equators, consists of ____________________.

  1. Water vapour, and dust, dense air

  2. Dust particles, gaseous and liquid water and dense air (nitrogen and oxygen)

  3. Clouds, dense air, water vapours and carbon dioxide

  4. Carbon dioxide and oxygen
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

The troposphere contains the majority of the atmosphere's mass, including water vapor, dust, and dense gases like nitrogen and oxygen.

Multiple choice evs - i what is around us? atmosphere and its structures the atmosphere components of earth elements of weather and climate : temperature the earth's structure

What is the percentage of oxygen in the atmosphere?

  1. 78%

  2. 21%

  3. 12%

  4. 11%
Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation

Atmosphere is the layer of gases surrounding the planet. The major gases present in atmosphere are nitrogen, oxygen, argon, carbon dioxide and other gases in minute quantity. The percentage of oxygen present in atmosphere is 21.