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 zoology natural resources - air, water and land carbon cycle ozone layer depletion and causes depletion of ozone layer

Identify the incorrect statement from the following

  1. Oxides of nitrogen in the atmosphere can cause the depletion of ozone layer

  2. Ozone absorbs the intense ultraviolet radiations of the sun

  3. Depletion of ozone layer is because of its chemical reactions with CFC

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

Ozone doesn't absorb infrared radiation , it absorbs ultraviolet radiations .

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

$CO _2$ absorbs some of the ....... that radiates from the surface of Earth to space

  1. ozone

  2. heat

  3. ultraviolet light

  4. smog
Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation
CO2 is a greenhouse gas. When radiations of the sun reach earth, they are reflected back from the earth's surface. CO2 absorbs some of the radiation and prevents it from getting escaped due to which the temperature of earth rises. This is called the greenhouse effect. Excess concentration of CO2 thus, can lead to an abnormal increase in earth's temperature and cause global warming. 
So, the correct answer is 'heat'.
Multiple choice zoology human influences on the environment carbon cycle ozone layer depletion and causes depletion of ozone layer

Ozone is

  1. Protector in troposphere

  2. Pollutant in troposphere

  3. Green house gas

  4. Both B and C
Reveal answer Fill a bubble to check yourself
D Correct answer
Explanation

Ozone is a significant gas in the stratosphere because it absorbs the UV rays and do not allow them to reach the earth's surface. There it is formed by the reaction of oxygen with UV rays. However, tropospheric or ground-level ozone is formed as a secondary pollutant and is harmful. It acts as a major constituent of the photochemical smog. It also traps and reflect back the infra-red rays coming from the earth's surface. Here, it is formed when the primary pollutants react with the oxygen in the presence of sunlight. So, it acts as a greenhouse gas.

Hence, the correct answer is 'Both B and C'.

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

Cyclic variations of CO2CO2 concentration in the atmosphere are due to changes in

  1. photosynthetic activity

  2. respiratory activity

  3. burning of fossil fuels

  4. action of infra-red rays
Reveal answer Fill a bubble to check yourself
C Correct answer
Explanation

The burning of fossil fuels such as gasoline, coal, oil, natural gas in combustion reactions results in the production of carbon dioxide. There are cyclic variations of Carbon dioxide concentration in the atmosphere due to this reason. 

So, the correct optionos 'Burning of fossil fuels'.

Multiple choice zoology ecosystems decomposition in ecosystem ecosystem productivity and decomposition producers, consumers and decomposers

Bacterial decomposition of organic matter, releases $NO _{2}$ into

  1. Stratosphere

  2. Troposphere

  3. Atmosphere

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

Bacterial decomposition of organic matter releases various gases, including nitrogen compounds, into the atmosphere. The atmosphere is the general reservoir for these gases.

Multiple choice zoology global environmental change causes of greenhouse effect global warming adaptation in animals

Presence of CFCs in the atmosphere is responsible for

  1. Formation of ozone

  2. Production of healthy plants

  3. Depletion of ozone layer

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

CFCs are used as coolants in refrigerators, coolers, etc. The CFCs causes the breaking of the ozone molecule which forms the oxygen radical and O$ _2$. So, the presence of CFCs in the atmosphere results in the depletion of the ozone layer and allowing the penetration of the harmful UV radiations from the sun into the Earth's atmosphere. 

Thus, the correct answer is option C. 

Multiple choice zoology global environmental change causes of greenhouse effect global warming adaptation in animals

If there was no $CO 2$ in the earth's atmosphere, the temperature of the earth's surface would be ________

  1. Same as the present level

  2. More than the present level

  3. Less than the present level
  4. Dependent on $O _2$ content of atmosphere
Reveal answer Fill a bubble to check yourself
C Correct answer
Explanation

Carbon dioxide atmosphere absorbs and stores the energy near the earth's surface when incoming solar radiation is reflected back to the space. If there was no carbon dioxide then there would no absorption of solar energy and hence the temperature of earth's surface would be less than the present level. So, the correct answer is 'Less than the present level'.

Multiple choice geography earth as a planet atmosphere and its structures what is around us? the atmosphere the earth's structure components of earth earth and structure

Which of the following statements about Earth's atmosphere is wrong?

  1. The gaseous envelop of the earth that consists of a mixture of gases and water vapours is called atmosphere
  2. The lower level of the atmosphere up to about $7$ miles is called troposphere

  3. The middle region of the atmosphere is called stratosphere

  4. The locus of the point in space where gravity is constant is called ionosphere
Reveal answer Fill a bubble to check yourself
D Correct answer
Explanation

The ionosphere is a region of the upper atmosphere ionized by solar radiation; it is not defined by the locus of points where gravity is constant.

Multiple choice geography earth as a planet atmosphere and its structures what is around us? the atmosphere the earth's structure components of earth earth and structure

Which of the following layers of atmosphere contains the electrically charged particles and reflects the ratio waves back to the earth's surface to make wireless communication possible?

  1. Troposphere

  2. Stratosphere

  3. Ionosphere

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

The ionosphere contains ionized particles that reflect radio waves, which is essential for long-distance wireless communication.

Multiple choice geography the realms of the earth atmosphere and its structures what is around us? the atmosphere the earth's structure

What is the upper part of the atmosphere called?

  1. Lithosphere

  2. Exosphere

  3. Barysphere

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

The exosphere is the outermost layer of Earth's atmosphere (i.e. the upper limit of the atmosphere). It extends from the exobase, which is located at the top of the thermosphere at an altitude of about 700 km above sea level, to about 10,000 km (6,200 mi; 33,000,000 ft) where it merges into the solar wind.

Multiple choice biology wastewater story personal and public cleanliness who will do this? basics of water pollution

Study the following statements about ozone:
(a) It is essential for the breathing of living organisms.
(b) It is used to disinfect water.
(c) It absorbs ultraviolet rays.
(d) Its proportion of air is about 3%. Which of these statements are correct?

  1. (a), (b) and (c)

  2. (b) and (c)

  3. (a) and (d)

  4. All four

Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation
  • Ozone, or trioxygen, is an inorganic molecule with the chemical formula $O _3$. It is a pale blue gas with a distinctively pungent smell.
  • Oxygen is essential for the breathing of living organisms. Hence statement (a) is incorrect.
  • Ozone is a powerful oxidant, stronger than chlorine. Ozone is used to disinfect, deodorize, decolourize and decompose organic substances in water. Hence Statement (b) is correct.
  • The ozone layer or ozone shield is a region of Earth's stratosphere that absorbs most of the Sun's ultraviolet radiation. Hence statement (c) is correct.
  • The proportion of ozone in the air is 0.000004%. Hence Statement (d) Is incorrect.
  • So, the correct answer is '(b) and (c)'.
Multiple choice physics spectra the electromagnetic spectrum electromagnetic spectrum electromagnetic waves

Which of the following solar radiations pass through the atmosphere of earth:
X-rays, ultraviolet rays, visible light rays, infrared radiation.

  1. X-Ray

  2. Ultraviolet

  3. Visible

  4. Infrared
Reveal answer Fill a bubble to check yourself
C,D Correct answer
Explanation

Generally, three types of radiation come from the sun to Earth, they are, ultraviolet radiation, visible light, and,  infrared radiation. Out of these three radiations, ultraviolet radiation is prevented by the ozone layer and visible light and high-frequency infrared radiation reach to earth, because they can pass through the atmosphere of the Earth.