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 what is around us? atmosphere and its structures the atmosphere components of earth elements of weather and climate : temperature the earth's structure
The most important layer of atmosphere is ___________.

  1. Troposphere

  2. Thermosphere

  3. Mesosphere

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

The layer of atmosphere near the surface of the earth or the lower-most one is called the troposphere. The average thickness of this layer is about 14 km. Most of the weather forming phenomena occur in this layer. The significance of this layer is very crucial for the earth. It is the most important layer of the atmosphere. 

Multiple choice geography what is around us? atmosphere and its structures the atmosphere components of earth elements of weather and climate : temperature the earth's structure

The lowest layer of the atmosphere called troposphere, which varies from $4$ to $5$ miles in depth at the poles to approximately $10$ miles at the equators, consists of ____________________.

  1. Water vapour, and dust, dense air

  2. Dust particles, gaseous and liquid water and dense air (nitrogen and oxygen)

  3. Clouds, dense air, water vapours and carbon dioxide

  4. Carbon dioxide and oxygen
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

The troposphere contains the majority of the atmosphere's mass, including water vapor, dust, and dense gases like nitrogen and oxygen.

Multiple choice evs - i what is around us? atmosphere and its structures the atmosphere components of earth elements of weather and climate : temperature the earth's structure

What is the percentage of oxygen in the atmosphere?

  1. 78%

  2. 21%

  3. 12%

  4. 11%
Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation

Atmosphere is the layer of gases surrounding the planet. The major gases present in atmosphere are nitrogen, oxygen, argon, carbon dioxide and other gases in minute quantity. The percentage of oxygen present in atmosphere is 21.

Multiple choice geography what is around us? atmosphere and its structures the atmosphere components of earth elements of weather and climate : temperature the earth's structure

Atmosphere is classified into different zones, which of the following is not among this classification?

  1. Ionosphere

  2. Ozonosphere

  3. Lithosphere

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

In the given options, ionosphere and ozonosphere are included in atmosphere.  Ionosphere consists of ions due to ultra violet radiations causing photo ionization and hence forming ionosphere. Ozonosphere is also called as stratosphere which consists of ozone gases that prevents UV rays from entering the earth’s surface. On the other hand lithosphere is not a layer of atmosphere but it is a hard surface consisting of rocks on earths surface.

Multiple choice geography what is around us? atmosphere and its structures the atmosphere components of earth elements of weather and climate : temperature the earth's structure

Which of the following layers of atmosphere absorb UV light radiations?

  1. Ionosphere

  2. Ozonosphere

  3. Troposphere

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

Layer of atmosphere which absorbs UV light radiations is known as ozonosphere. It is a region of Earth's stratosphere. This region contains high concentrations of ozone in comparison to other parts of the atmosphere. Ozonosphere is mainly found in the lower portion of the stratosphere. This layer protects earth from harmful UV light radiations.

Multiple choice geography what is around us? atmosphere and its structures the atmosphere components of earth elements of weather and climate : temperature the earth's structure

Which of the following gases protects us from harmful sun rays?

  1. Carbondioxide

  2. Nitrogen

  3. Ozone

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

Ozone is an inorganic molecule which is formed by three atoms of oxygen. It is an allotrope of oxygen. Ozone protects us from harmful sun rays. It is present in ozonosphere region of stratosphere. Ozone layer absorbs dangerous UV radiation from sun rays. It protects us from skin cancer and other health damage. However, ozone layer is depleting due to harmful gases like CFCs, i.e. Chlorofluorocarbons.

Multiple choice geography what is around us? atmosphere and its structures the atmosphere components of earth elements of weather and climate : temperature the earth's structure

Ozone is present in which of the layers of atmosphere ____________.

  1. Troposphere

  2. Stratosphere

  3. Mesosphere

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

Ozone is present in  the Stratosphere. This region is known as ozonosphere. This region contains high concentrations of ozone in comparison to other parts of the atmosphere. It absorbs UV light radiations coming from sun and protect the earth. Ozone is mainly found in the lower portion of the stratosphere.

Multiple choice geography what is around us? atmosphere and its structures the atmosphere components of earth elements of weather and climate : temperature the earth's structure

What is the reason for the Troposphere to be at a greater height at the Equator?

  1. Conventional currents

  2. Conduction

  3. Terrestrial radiation

  4. All of above
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

Convectional currents, caused by intense heating at the equator, cause air to rise and expand, leading to a greater height of the troposphere at the equator.

Multiple choice geography what is around us? atmosphere and its structures the atmosphere components of earth elements of weather and climate : temperature the earth's structure

Layer where the atmosphere thins out and merges with interplanetary space is called ______________.

  1. Mesosphere

  2. Ionosphere

  3. Troposphere

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

Layer where the atmosphere thins out and merges with interplanetary space is called exosphere. Exosphere is the outermost layer of the Earth's atmosphere. It extends from about 600 km until it thins out to merge with interplanetary space. Due to this, exosphere is about 10,000 km or 6,200 miles thick or about as wide as the Earth. The top boundary of Earth's exosphere extends about halfway to the Moon.

Multiple choice geography what is around us? atmosphere and its structures the atmosphere components of earth elements of weather and climate : temperature the earth's structure

In which layer of the atmosphere all the weather and climate phenomenon take place?

  1. Mesosphere

  2. Thermosphere

  3. Troposphere

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

Troposphere,

The troposphere is the lowermost layer of the Earth's atmosphere. Most of the weather phenomena, systems, convection, turbulence and clouds occur in this layer, although some may extend into the lower portion of the stratosphere. 

The troposphere contains almost all the atmospheric water vapour, in fact it contains about 70 to 80 per cent of the total mass of the Earth's atmosphere and 99 per cent of the water vapor. Temperature and water vapor content in the troposphere decrease rapidly with altitude and thus most of the water vapour in the troposphere is concentrated in the lower, warmer zone. Water vapor concentrations vary with latitude. They are greatest above the tropics and decrease toward the polar regions.

Multiple choice geography what is around us? atmosphere and its structures the atmosphere components of earth elements of weather and climate : temperature the earth's structure

The part of the atmosphere above the 90 km from the earth is called ________.

  1. homosphere

  2. heterosphere

  3. ozone layer

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

The heterosphere is the upper portion of the Earth's atmosphere, in which gases are fractionated according to their molecular weight. It lies above the homosphere, where chemical constituents are well mixed. On average the heterosphere begins at an altitude of about 80 km.

Multiple choice geography what is around us? atmosphere and its structures the atmosphere components of earth elements of weather and climate : temperature the earth's structure

In the lower parts of the stratosphere, there is no change in temperature with altitude. This zone is called ________.

  1. Thermosphere

  2. Isothermal Zone

  3. Ozone layer

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

In the lower parts of the stratosphere, there is no change in temperature with altitude. This zone is called isothermal zone
An isothermal layer is defined as a vertical column of air having a constant temperature with height. Isothermal layers often occur in the low levels of the troposphere during a differential advection situation.