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

The lowest zone of atmosphere is

  1. Stratosphere

  2. Ionosphere

  3. Troposphere

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

The troposphere is the lowest layer of Earth's atmosphere, where almost all weather phenomena occur. It extends from the surface to about 8 to 15 kilometers in altitude.

Multiple choice

Match the following ||| |---|---| |a. Hydrosphere|1. The water on the Earth's surface and sometimes includes water over the surface, such as clouds. | |b. Troposphere|2. The outermost layer of the atmosphere, between the mesosphere and interplanetary space, where air becomes extremely thin.| |c. Thermosphere|3. The lowest region of the atmosphere, extending from the earth's surface to a height of about 6–10 km. |

  1. a - 1, b - 2, c - 3

  2. a - 1, b - 3, c - 2

  3. a - 3, b - 1, c - 2

  4. a - 2, b - 1, c - 3

  5. a - 2, b - 3, c - 1
Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation

This is the correct option. Hydrosphere is the water on Earth's surface and sometimes includes water over the surface such as clouds. Troposphere is the lowest region of the atmosphere, extending from Earth's surface to a height of about 6–10 km. Thermosphere is the outermost layer of the atmosphere, between the mesosphere and interplanetary space, where air becomes extremely thin.

Multiple choice

The harmful solar rays UV-B are absorbed by

  1. Oxygen

  2. Ozone

  3. Nitrogen

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

The ozone layer in the stratosphere acts as a shield, absorbing the majority of the sun's harmful ultraviolet (UV-B) radiation before it reaches the surface.

Multiple choice

The outermost layer of Sun is called

  1. Chromosphere

  2. Corona

  3. Photosphere

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

The corona is the outermost layer of the Sun's atmosphere, visible during a total solar eclipse as a glowing halo.

Multiple choice

Which of the following statements is/are correct about polar stratospheric clouds (PSCs)?

  1. PSCs do not react with chlorine nitrate and HCl.

  2. A tight whirlpool of wind called polar vortex is formed which surrounds Antarctica.

  3. Type II clouds are formed at about - 85˚C and contain some ice.

  4. Type I clouds are formed at about - 77˚C and contain solid HNO3.3H2O.

  5. Statements 2 and 4 are correct.
Reveal answer Fill a bubble to check yourself
C Correct answer
Explanation

This statement is correct because Type II clouds are those which are formed at about - 85˚C and contain some ice. So this option is wrong.

Multiple choice

In atmosphere the lowermost layer is the

  1. Troposphere

  2. Exosphere

  3. Ionosphere

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

The troposphere is the lowest layer of Earth's atmosphere, extending from the surface to about 8 to 15 kilometers, where most weather phenomena occur.

Multiple choice

Which atmospheric layer is nearest to the earth?

  1. Thermosphere

  2. Mesosphere

  3. Stratosphere

  4. Troposphere

Reveal answer Fill a bubble to check yourself
D Correct answer
Explanation

The troposphere is the lowest layer of Earth's atmosphere, extending from the surface to about 8 to 15 kilometers high. It is where most weather phenomena occur.