Environmental Studies · Geography

Atmospheric Structure and Ozone

1,401 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 geography environmental changes elements of weather and climate : temperature process of heat transfer in the atmosphere environmental regions (zones)

What percent of the insolation is absorbed by the atmosphere?

  1. 10%

  2. 12%

  3. 17.5%

  4. 20%
Reveal answer Fill a bubble to check yourself
C Correct answer
Explanation
The budget for solar radiation is as follows (percentage)
Reflected: 35%
Absorbed by atmosphere: 17.5%
Scattered to the Earth from the blue sky: 10.5%
Scattered to the Earth from clouds: 14.5%
Radiation going directly to Earth's surface: 22.5%
Multiple choice geography environmental changes elements of weather and climate : temperature process of heat transfer in the atmosphere environmental regions (zones)

Which gas can hold the heat in the atmosphere for a long time?

  1. Oxygen

  2. Nitrogen

  3. Carbon di oxide

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

Carbon dioxide can hold the heat in the atmosphere for a long time. It constitutes only 0.03 percent of the dry air. Being an effective absorber of heat from the upper atmosphere as well as the earth, carbon dioxide is considered to be of great climatic significance. This gas emits about half of the absorbed heat back to the earth.

Multiple choice geography environmental changes elements of weather and climate : temperature process of heat transfer in the atmosphere environmental regions (zones)

Ozone layer protects the earth from ____________.

  1. X-rays

  2. Infra-red rays

  3. Cosmic rays

  4. Ultra-violet rays
Reveal answer Fill a bubble to check yourself
D Correct answer
Explanation
  • The ozone layer blocks the harmful ultra-violet rays coming from the sun and prevents it from reaching the earth's surface thus play an extremely important role. However it cannot block x-rays, infrared rays or cosmic rays. Hence option D is correct.
  • The ozone layer is found in the lower stratosphere 
Multiple choice geography environmental changes elements of weather and climate : temperature process of heat transfer in the atmosphere environmental regions (zones)

In which layer of the atmosphere, ozone layer is present?

  1. Troposphere

  2. Stratosphere

  3. Mesosphere

  4. Thermosphere
Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation
stratosphere
The ozone layer is mainly found in the lower portion of the stratosphere, from approximately 15 to 35 kilometers (9.3 to 21.7 mi) above Earth, although its thickness varies seasonally and geographically.
Multiple choice geography human activities and environmental degradation study of water pollution threats to water resource major hazards in india and prevention

Ozone layer depletion is due to ________.

  1. air pollution

  2. water pollution

  3. soil pollution

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

The ozone layer plays a important role in protecting humans and other living organisms from the harmful UV rays of the sun. The ozone layer is present in the stratosphere, and is now depleted due to air pollution which leads to global warming.

Multiple choice evs weather, climate and adaptation of animals to different climates climate and weather weather, climate and adaptations of animals to climate atmosphere and its components

Almost all of the earth's weather occurs in the:

  1. Exosphere

  2. Stratosphere

  3. Mesosphere

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

The troposphere is the lowest layer of the atmosphere where most clouds form and weather phenomena occur. It contains the vast majority of the atmosphere's water vapor.

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

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.