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 evs - i the earth and its living world introduction to the spheres of the earth origin of universe introduction to natural resources

Atmospheric layer protective to living beings from harmful rays is :

  1. Mesosophere

  2. Ozonosphere

  3. Thermosphere

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

The ozonosphere (ozone layer) in the stratosphere protects life from harmful UV radiation. The thermosphere also absorbs high-energy X-rays and gamma rays, providing additional protection. Both layers contribute to shielding Earth from dangerous solar and cosmic radiation.

Multiple choice evs - i the earth and its living world introduction to the spheres of the earth origin of universe introduction to natural resources

Ionosphere is between :

  1. Stratosphere and mesosphere

  2. Mesosphere and thermosphere

  3. Troposphere and stratosphere

  4. Troposphere and Thermosphere
Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation

The ionosphere is an ionized region of the upper atmosphere that overlaps with the mesosphere and thermosphere, typically situated between them.

Multiple choice evs - i the earth and its living world introduction to the spheres of the earth origin of universe introduction to natural resources

Ionosphere occurs in

  1. Thermosphere

  2. Homosphere

  3. Mesosphere

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

The ionosphere is not another atmospheric layer. It occupies the same region of the upper atmosphere as the thermosphere. In this region of the atmosphere the Sun's energy is so strong that it breaks apart molecules and atoms of air, leaving ions. So the correct answer is 'Thermosphere'.

Multiple choice evs - i the earth and its living world introduction to the spheres of the earth origin of universe introduction to natural resources

Ozonosphere is component of

  1. Troposphere

  2. Stratosphere

  3. Mesosphere

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

Troposphere is the layer where all weather occurs. this is the lowest layer.

Above the troposphere lies the stratosphere where temperatures increase with altitude because of increasing amounts of ozone. The ozone layer within the stratosphere absorbs harmful ultraviolet rays of sunlight. After that comes mesosphere and thermosphere. So the correct answer is 'Stratosphere '

Multiple choice evs - i the earth and its living world introduction to the spheres of the earth origin of universe introduction to natural resources

Which one is nearly absent in ozonosphere?

  1. Dust particles

  2. Water vapours
  3. CO$ _2$

  4. All the above
Reveal answer Fill a bubble to check yourself
D Correct answer
Explanation

The Ozone layer or ozone shield is a region of Earth's stratosphere that absorbs most of the Sun's ultraviolet radiation. It contains high concentrations of ozone (O3) in relation to other parts of the atmosphere, although still small in relation to other gases in the stratosphere. As the ozonosphere only contains high levels of ozone gas, therefore all the other things such as the dust particles. water vapours and CO2 are absent from it. 

So, the correct answer is 'All of the above. '

Multiple choice evs - i the earth and its living world introduction to the spheres of the earth origin of universe introduction to natural resources

Mesosphere is component of

  1. Atmosphere

  2. Hydrosphere

  3. Lithosphere

  4. Both A and B
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation
Earth's atmosphere is divided into five main layers: the exosphere, the thermosphere, the mesosphere, the stratosphere and the troposphere. Therefore mesosphere is the second most layer of the atmosphere measure from the surface of the earth and is therefore a component of the atmosphere. The mesosphere is directly above the stratosphere and below the thermosphere. It extends from about 50 to 85 km (31 to 53 miles) above our planet.
So, the correct answer is 'Atmosphere'.
Multiple choice evs - i the earth and its living world introduction to the spheres of the earth origin of universe introduction to natural resources

The layer of atmosphere which protects the living beings from harmful rays is 

  1. Mesosphere

  2. Ozonosphere

  3. Thermosphere

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

Ozone is concentrated mainly in the stratosphere, where it absorbs solar radiation, protecting Earth's living organisms from the ultraviolet light from the sun. UV radiation is harmful to DNA; without the atmosphere's ozone, living organisms could not exist and thrive as they do now. The area in which ozone is concentrated in stratosphere is called the ozonosphere, So the correct answer is 'Both B and C'.

Multiple choice evs - i the earth and its living world introduction to the spheres of the earth origin of universe introduction to natural resources

UV radiations absorbed by ozone layer are

  1. UV-C

  2. Complete UV-C and a large amount of UV-B

  3. Complete UV-C and complete UV-B

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

Most of the sun's UV-B radiation is absorbed by ozone in the stratosphere. UV-C radiation is absorbed by oxygen and ozone in the stratosphere and never reaches the Earth's surface. This is good because the C type rays are the most damaging of all. So the correct answer is 'Complete UV-C and a large amount of UV-B '

Multiple choice evs - i the earth and its living world introduction to the spheres of the earth origin of universe introduction to natural resources

Ozone protects biosphere from high energy _____________.

  1. Infra-red rays

  2. Ultraviolet rays

  3. X-rays

  4. Gamma rays

  5. Cosmic rays
Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation

The ozone layer in the stratosphere absorbs the majority of the sun's harmful ultraviolet (UV) radiation, protecting living organisms from DNA damage and skin cancer.

Multiple choice evs - i the earth and its living world introduction to the spheres of the earth origin of universe introduction to natural resources

UV radiations in the stratosphere are absorbed by

  1. Oxygen

  2. Ozone

  3. Sulphur dioxide

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

The stratosphere is the second layer of the atmosphere. At the equator, it is at the height of 20 km and at poles at 7 km. The stratosphere shows the presence of the ozone layer that has formed due to the reaction of the UV rays with the atmosphere. The ozone so formed in capable of absorbing the UV rays emanating from the sun, including the UV-B which is the most harmful. Due to this absorption, the stratosphere shows the stratification of temperature. The temperature is more towards the upper layers of the atmosphere and less towards the troposphere. 

Hence, the correct answer is 'Ozone'