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

Which of the following factor/s are responsible for favourable life conditions on Earth a. Sufficient distance of Earth from Sun. b. The presence of layer of carbon dioxide and water vapour. c. The presence of layer of ozone.

  1. only a

  2. a and b

  3. a, b and c

  4. only c

  5. b and c
Reveal answer Fill a bubble to check yourself
C Correct answer
Explanation

Sufficient distance of Earth from Sun, the presence of layer of carbon dioxide and water vapour and the presence of layer of ozone, are the factors responsible for favourable life conditions on Earth. Thus, this is the correct option. 

Multiple choice

Match List I with List II and select the correct answer: List I A. Ozone Hole B. Greenhouse effect C. Global warming D. Albedo List II

  1. Difference in the outgoing and incoming longwave radiation
  2. Acceleration of ozone destruction
  3. Increase in the carbon dioxide level
  4. Ratio of reflected radiation to radiation received

  1. A 2 B 1 C 3 D 4

  2. A 4 B 1 C 3 D 2

  3. A 3 B 2 C 1 D 4

  4. A 2 B 3 C 4 D 1
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

The Ozone Hole is caused by the acceleration of ozone destruction. The Greenhouse effect involves the trapping of longwave radiation. Global warming is linked to the increase in CO2 levels. Albedo is the ratio of reflected to received radiation.

Multiple choice

Match List-I with List-II and select the correct answer.List I(Layers of atmosphere)A. StratosphereB. Exosphere C. TroposphereD. IonosphereList II(Characteristics related with the layers) 1. Temperature increases with decreasing in height 2 Aurora Borealis and Aurora Australis are produced 3. Contains much of the total atmospheric ozone 4. Atoms of oxygen, hydrogen and helium from the tenuous atmosphere

  1. A 1 B 3 C 2 D 4

  2. A 3 B 4 C 1 D 2

  3. A 3 B 1 C 2 D 4

  4. A 4 B 3 C 1 D 2
Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation

The Stratosphere contains the ozone layer (A-3). The Exosphere is the outermost layer where atoms are tenuous (B-4). In the Troposphere, temperature increases as you move toward the surface (C-1). The Ionosphere is where Auroras are produced (D-2).

Multiple choice

Consider the following statements:

  1. Ozone is found mostly in the stratosphere

  2. Ozone layer lies 55-75 km above the surface of the earth

  3. Ozone absorbs ultraviolet radiation from the sun

  4. Ozone layer has no significance for life on the earth

Which of the above statements is/are correct?

  1. 1 and 3

  2. 2 and 4

  3. 2 and 3

  4. 1 and 4
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

Ozone is primarily found in the stratosphere (15-35 km altitude) and is vital for life because it absorbs harmful ultraviolet (UV) radiation. Statement 2 is incorrect because the ozone layer is lower than 55 km, and statement 4 is false because ozone is essential for survival.

Multiple choice

Oxygen and ozone are-

  1. Allotropes

  2. Isotopes

  3. Isomers

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

Allotropes are different physical forms in which an element can exist. Oxygen (O2) and Ozone (O3) are both composed solely of oxygen atoms but differ in their molecular structure and properties. Isotopes differ in neutron count, isomers differ in molecular arrangement of the same atoms in compounds, and isobars have the same mass number but different atomic numbers.

Multiple choice

Direction for question: The question consists of four sentences on a topic. Some Sentences are grammatically incorrect or inappropriate. Select the option that indicates the grammatically correct and appropriate sentence(s).

A. Large reductions in the ozone layer, which sits about 15 – 30 km above the Earth, take place each winter over the polar regions, especially the Antarctic, as low temperatures allow the formation of stratospheric clouds that assist chemical reactions breaking down ozone. B. Industrial chemicals containing chlorine and bromine have been blamed for thinning the layer because they attack the ozone molecules, making them to break apart. C. Many an offending chemicals have now been banned. D. It will still take several decades before these substances have disappeared from the atmosphere.

  1. D

  2. B & D

  3. A & D

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

The right answer is (3).

Both B and C have grammatical errors. “Making them to break apart” in statement B and “many an offending……. have” in statement C do not appear to be correct.

Multiple choice

Directions: Choose the word that substitutes the following phrase.

The part of the earth's surface and atmosphere inhabited by living things

  1. Biosphere

  2. Atmosphere

  3. Clouds

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

The biosphere refers to the regions of the surface, atmosphere, and hydrosphere of the earth occupied by living organisms. It represents the global sum of all ecosystems and is the zone where life exists. Other terms like atmosphere or ozone refer only to specific layers of the Earth's surroundings.