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 geography environmental changes atmosphere as a green house global warming and climate change energy from the sun

The release of chlorofluorocarbons by the use of refrigerators, air conditioners, deodorants, etc., are destroying the ________ layer of the atmosphere.

  1. Mesosphere

  2. Ionosphere

  3. Humidity

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

D. Ozone

When the CFC refrigerants are leaked from refrigeration or air-conditioning systems, they drift around the lower layers of the atmosphere. Slowly they start infiltrating into the upper layers of the atmosphere and soon reach the ozone rich stratosphere, where they undergo major chemical changes.

Multiple choice geography environmental changes atmosphere as a green house global warming and climate change energy from the sun

The ozone layer absorbs __________ and protects the living beings of the earth. 

  1. water vapour

  2. light

  3. infrared rays

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

The ozone layer basically absorbs harmful emissions from the sun like the ultraviolet rays, which is why life on earth is able to thrive. No other planet known to man has conditions that can favor life, and without the ozone layer, Earth would also become unable to support life. Below are some things that would happen if the ozone layer was damaged to any extent.

Cancer: one of the things that would be frequently experienced by human beings on Earth is skin cancer. Since the layer would not be able to effectively block UV rays, human skin would most likely be endangered.

Cataracts: this refers to a condition where human vision goes blurred. Almost all human beings on earth would have some sort of visual impairment without the ozone layer.

Multiple choice geography environmental changes atmosphere as a green house global warming and climate change energy from the sun

The ozone layer protects the earth from harmful _________________.

  1. infared rays

  2. ultraviolet rays

  3. cosmetic rays

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

Ultraviolet rays,

The ozone layer acts as a filter for the shorter wavelength and highly hazardous ultraviolet radiation (UVR) from the sun, protecting life on Earth from its potentially harmful effects. When the sky is clear, there is an inverse relationship between stratospheric ozone and solar UVR measured at the Earth's surface.

Multiple choice evs - i for a pollution free nature ways to prevent air pollution ways to reduce air pollution reducing air pollution

Air pollution takes place in two different layers of the earth's atmosphere :_______.

  1. troposphere and stratosphere

  2. mesosphere and troposphere

  3. stratosphere and hydrosphere

  4. troposphere and hydrosphere
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

Air pollution takes place in two different layers of the earth's atmosphere : troposphere and stratosphere.

Multiple choice physics movement of the earth properties of stars life cycle of stars solar system and its planets types of galaxies galaxies

What are known as Sun Spots?

  1. Cooler regions on photosphere

  2. Hotter regions on photosphere

  3. Cooler regions on stratosphere

  4. Hotter regions on stratosphere
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

Spots formed on the surface of the Sun that are darker and cooler are called the Sun's spots.

They may differ in size from small to large also.

Multiple choice origin of universe universe and organic evolution biology

Concentration of ozone in troposphere is :

  1. 0.05 ppm

  2. 0.1 ppm

  3. 1.5 ppm

  4. 10.0 ppm
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

The concentration of ozone in the troposphere is typically very low, often cited around 0.05 ppm in clean or background conditions.

Multiple choice origin of universe universe and organic evolution biology

Which was not present freely in the early atmosphere of the earth?

  1. Water

  2. Carbon monoxide

  3. Hydrogen

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

According to modern theories of chemical evolution and Oparin-Haldane's hypothesis, the early atmosphere of the earth was reducing, containing water vapor, hydrogen, ammonia, and methane, but free oxygen was absent.

Multiple choice biology concept of life theories of the origin of life origin of life the origin of cells and cell division

Atmosphere of earth just before the origin of life consisted of  ___________________.

  1. Water vapours, $CH _4 , NH _3 $ and Oxygen
  2. $ CH _4 , NH _3 $ and $CH _4$
  3. $ CO _2 , NH _3 , H _2 $ and water vapours
  4. $ CH _4 , O _3 , O _2 $ and water vapours
Reveal answer Fill a bubble to check yourself
C Correct answer
Explanation

The Oparin-Haldane hypothesis suggests that the primitive atmosphere was reducing, containing methane, ammonia, hydrogen, and water vapor. Carbon dioxide is sometimes included in models of the early atmosphere.

Multiple choice biology concept of life theories of the origin of life origin of life the origin of cells and cell division

The term, reducing atmosphere for the early earth means that the atmosphere

  1. Was much thinner around the surface of the earth than now

  2. Contained only two or three kinds of gases

  3. Contained little or no free oxygen

  4. Contained little or no free nitrogen
Reveal answer Fill a bubble to check yourself
C Correct answer
Explanation
Scientists believe that the Earth was formed about 4.5 billion years ago. Its early atmosphere was probably formed from the gases given out by volcanoes. It is believed that there was intense volcanic activity for the first billion years of the Earth's existence. The early atmosphere was probably mostly carbon dioxide, with little or no oxygen. There were smaller proportions of water vapour, ammonia and methane.
So the correct option is 'contained little or no free oxygen'.
Multiple choice zoology concept of life theories of the origin of life origin of life the origin of cells and cell division

Transformation of the early reducing atmosphere of the earth into an oxidizing atmosphere was mainly due to the activities of

  1. Aerobic photosynthesizers

  2. Anaerobic heterotrophs

  3. Anaerobic photosynthesizers

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

Cyanobacteria are thought to be the first aerobic photosynthesizers evolved which gradually increased the oxygen portion of atmosphere changing it into oxidising one. The aerobic respiration was thus helpful for the animals to survive.

Thus, the correct answer is option A. 

Multiple choice zoology allotropy of oxygen ozone - a case study stratospheric pollution ozone and its depletion

In antarctica, ozone depletion is due to the formation of which of the following compounds?

  1. Acrolein

  2. PAN

  3. PCBs

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

Ozone layer depletion is caused due to CFC's. So, chlorine nitrate, which is found in the stratosphere causes break down of the ozone layer. Chlorine is highly reactive and it interacts with ozone and hence destroys the ozone layer.