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 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.

Multiple choice physics spectra the electromagnetic spectrum electromagnetic spectrum electromagnetic waves

Earth's atmosphere is transparent for

  1. only the visible light

  2. only the X-rays
  3. only the $\gamma$- rays

  4. visible light and microwaves
Reveal answer Fill a bubble to check yourself
D Correct answer
Explanation

Earth's atmosphere is divided into different layers, out of which the ozone layer absorbs the X-rays and $\gamma$-rays whereas visible light and microwaves are the waves which are not absorbed by any layer of atmosphere.

Multiple choice evs atmosphere- wind weather, climate and adaptation of animals to different climates climate and weather weather, climate and adaptations of animals to climate

Ozone is formed in stratosphere by action of ultravoilet radiations on oxygen.

  1. True

  2. False

  3. Either

  4. Neither
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation
Ozone (O3) molecule is made up of three oxygen atoms. It is formed in the stratosphere when single oxygen atom combines with a molecule of oxygen i.e. when [O] combines with O2. Oxygen molecule consisting of two oxygen atoms splits into atomic oxygen in the presence of ultraviolet radiation. The atomic oxygen then combines with another molecule of oxygen to form ozone.
The reactions are as follows:
      UV light
O2 ---------------> [O] + [O]
[O] + O2 ---------->O3
Hence, the statement given in the question is correct.
So, the correct answer is 'True'.
Multiple choice evs atmosphere- wind weather, climate and adaptation of animals to different climates climate and weather weather, climate and adaptations of animals to climate

Closest atmospheric layer to earth's surface is known as

  1. Boundary Layer

  2. Atmosphere

  3. Biosphere

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

The troposphere is the lowest layer, but the boundary layer is the specific portion of the troposphere that is directly influenced by the Earth's surface. While 'troposphere' is the standard answer for atmospheric layers, 'Boundary Layer' is technically correct in meteorological contexts.

Multiple choice evs atmosphere- wind weather, climate and adaptation of animals to different climates climate and weather weather, climate and adaptations of animals to climate

The earth's atmosphere is divided into layers based on the vertical profile of:

  1. Air pressure

  2. Air temperature

  3. Air density

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

The atmosphere is stratified into layers like the troposphere, stratosphere, mesosphere, and thermosphere based on how the air temperature changes with altitude.