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 higher-frequency radiation gets blocked by Earth's atmosphere?

  1. x-rays

  2. radio waves

  3. gamma rays

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

Earth's atmosphere is opaque to high-energy, high-frequency radiation like X-rays and gamma rays, which are absorbed by the upper atmosphere. This protects life on the surface from harmful ionizing radiation.

Multiple choice business organisation and correspondence environmental pollution and industries air pollution and its effects the environment and us environment and conservation

The lowest region of atmosphere is known as

  1. Stratosphere

  2. Ozonosphere

  3. Troposphere

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

The atmosphere comprises of layers based on temperature. Each layer has a specific composition of gases. These layers are the troposphere, the stratosphere, mesosphere and thermosphere. All these layers are placed to a different level from the earth. 

The troposphere is the lowest layer of the Earth's atmosphere. It starts at Earth's surface and goes up to a height of 7 to 20 km above sea level. Most types of clouds are found in this region, and almost all weather occurs within this layer. It holds nearly all of the water vapor in the Earth's atmosphere, regulates temperature and produces weather. Hence option C is correct.

Multiple choice business organisation and correspondence environmental pollution and industries air pollution and its effects the environment and us environment and conservation

Over heavily polluted areas of America and Europe, ozone level has fallen about

  1. 3%

  2. 7%

  3. 9%

  4. 2%
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

Scientific assessments of stratospheric ozone depletion in the late 20th century estimated that ozone levels over heavily populated regions in the Northern Hemisphere had declined by approximately 3%.

Multiple choice biology living in harmony climate factors abiotic components organisms and environment

The primary source of energy for the earth's atmosphere is:

  1. Energy from within the earth

  2. The sun

  3. Erupting volcanoes

  4. Lightning discharges associated with thunderstorms
Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation

The sun provides the vast majority of the energy that drives atmospheric circulation, weather patterns, and the heating of the Earth's surface and atmosphere. Other sources like geothermal or volcanic activity are negligible in comparison to solar radiation.

Multiple choice chemistry air and water pollution control environmental impact: global warming green house effect geobiochemical cycle

What is the effect of release of $CO _2$ gas on atmosphere?

  1. Global warming

  2. Photochemical smog

  3. Ozone layer depletion

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

Solution:- (A) Global warming

Extra $C{O} _{2}$ in the atmosphere increases the greenhouse effect. More thermal energy is trapped by the atmosphere, causing the planet to become warmer than it would be naturally. This increase in the Earth's temperature is known as global warming.

Multiple choice chemistry air and water pollution control environmental impact: global warming green house effect geobiochemical cycle

_________ is a gas in an atmosphere that absorbs and emits radiation within the thermal infra-red range.

  1. Global gas

  2. Greenhouse gas

  3. Green gas

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

A greenhouse gas (sometimes abbreviated GHG) is a gas in an atmosphere that absorbs and emits radiation within the thermal infrared range. This process is the fundamental cause of the greenhouse effect. The primary greenhouse gases in Earth's atmosphere are water vapor, carbon dioxide, methane, nitrous oxide, and ozone. 

Multiple choice zoology microbes in human welfare biofertilizers microbes as biocontrol agents and biofertilizers manuring

In the beginning there was no oxygen in earth's atmosphere. The activity of which organism is generally supposed to have made the earth's atmosphere aerobic or oxygen-rich?

  1. Monocotyledons

  2. Filamentous algae

  3. Cyanobacteria

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

Cyanobacteria also known as Cyanophyta, are a phylum of bacteria that obtain their energy through photosynthesis, and are the only photosynthetic prokaryotes able to produce oxygen. The name "cyanobacteria" comes from the color of the bacteria. Cyanobacteria, which are prokaryotes, are also called "blue-green algae", though the term "algae" in modern usage is restricted to eukaryotes. Phototrophic eukaryotes perform photosynthesis by plastids that may have their ancestry in cyanobacteria, acquired long ago via a process called endosymbiosis. These endosymbiotic cyanobacteria in eukaryotes may have evolved or differentiated into specialized organelles such as chloroplasts, etioplasts and leucoplasts. By producing and releasing oxygen (as a byproduct of photosynthesis), cyanobacteria are thought to have converted the early oxygen-poor, reducing atmosphere into an oxidizing one, causing the Great Oxygenation Event and the "rusting of the Earth", which dramatically changed the composition of the Earth's life forms and led to the near-extinction of anaerobic organisms.

So the correct option is 'cyanobacteria'.

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

Transitional layer between stratosphere and mesosphere is ______________.

  1. Troposphere

  2. Lithosphere

  3. Stratopause

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

The atmosphere is divided into layers separated by transition zones called pauses. The stratopause is the boundary layer that separates the stratosphere from the mesosphere above it.

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

Thickness of ozone in column of air from ground to top of atmosphere is measured in terms of

  1. Decibel units

  2. Pascal units

  3. Svedberg units

  4. Dobson units

  5. Angstrom units
Reveal answer Fill a bubble to check yourself
D Correct answer
Explanation
A. Decibel (dB) is the unit to measure the intensity of sound.
B. Pascal (Pa) is the unit measure pressure.
C. Svedberg (S) is a non-metric unit used to express the sedimentation coefficient of particles. 
D. Dobson unit (DU) is used to measure the thickness of earth's atmosphere.
E. Angstrom (Å) is a unit of length used to express the size of atoms, molecules etc.
Hence, thickness of ozone in column of air from ground to top of atmosphere is measured in terms of Dobson units.
So, the correct answer is 'Dobson units'.