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 commercial applications global environmental change causes of resource depletion causes of greenhouse effect ozone layer depletion

Which of the following statement/s is/are correct with regard to ozone depletion:
1. The ozone hole is measured in terms of ozone concentrations, which is expressed in Dobson units.
2. The major cause for ozone depletion is the presence of CFCs in the stratosphere - CFCs are entirely man-made and not found naturally.

  1. Only 1

  2. Only 2

  3. Both A and B

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

  • CFCs and other halogenated ozone depleting substances (ODS) are mainly responsible for manmade chemical ozone depletion.
  • The total amount of effective halogen (Chlorine and bromine) in the stratosphere can be calculated and are known as the equivalent effective stratospheric chlorine.
So, the correct option is 'Both A and B'.

Multiple choice

The ozone layer restricts

  1. Visible light

  2. Infrared radiation

  3. X-rays and gamma rays

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

The ozone layer in the Earth's stratosphere absorbs the majority of the Sun's harmful ultraviolet (UV) radiation, protecting life on the surface.

Multiple choice

Oxygen is found in many places on Earth, because of this it is from

  1. Biotic factors

  2. Biotic and Abiotic factors

  3. abiotic factors
Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation

Oxygen is found in many places on Earth because it comes from both biotic factors (living organisms like plants producing oxygen through photosynthesis) and abiotic factors (non-living sources like atmospheric processes and chemical reactions in rocks/minerals). If it came only from biotic factors, oxygen would only exist where life exists. If only from abiotic, oxygen wouldn't be tied to biological processes.

Multiple choice

What does the ozone layer do?

  1. Stops people from leaving the earths atmosphere

  2. Stops aliens getting in to Earth

  3. It filters the suns UV rays

  4. It doesn't do anything
Reveal answer Fill a bubble to check yourself
C Correct answer
Explanation

The ozone layer in the Earth's stratosphere absorbs most of the sun's harmful ultraviolet (UV) radiation, protecting life on the surface.

Multiple choice natural vegetation and wildlife of india and world resources of india and world general knowledge

Consider the following statements about availability of oxygen on Earth
1. Most oxygen of Earth's biosphere is stored in the lithosphere.
2. Phytoplanktons are a source of available oxygen in the Earth's atmosphere.
3. Some oxygen is made in the atmosphere when sunlight breaks down water.
Which of the statements given above are correct?

  1. 1 and 2

  2. 2 and 3

  3. 1 and 3

  4. All of these
Reveal answer Fill a bubble to check yourself
D Correct answer
Explanation

The lithosphere contains the largest reservoir of Earth's oxygen (about 99.5%), primarily bound in silicate and oxide minerals. Phytoplankton in the oceans are responsible for producing a major portion of the atmospheric oxygen through photosynthesis. Additionally, photolysis (the breakdown of water vapor by solar radiation in the upper atmosphere) also releases free oxygen.

Multiple choice

How does the ozone layer impact life on Earth?

  1. The ozone layer hole is the main reason for climate change

  2. It filters out harmful UV radiation from sunlight

  3. It magnifies sunlight, causing sunburn

  4. Aerosol cans still contain CFCs that thin the ozone layer
Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation

The ozone layer absorbs the majority of the Sun's high-frequency ultraviolet (UV) light. This shielding protects living organisms from harmful radiation that can cause skin cancer and cataracts. The ozone hole is not the primary driver of global climate change.

Multiple choice

Which gas in the atmosphere has the most influence on day-to-day weather changes?

  1. ozone

  2. oxygen

  3. water vapor

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

Water vapor is the most important gas for day-to-day weather because it is responsible for condensation, cloud formation, precipitation, and latent heat transfer. While other gases like carbon dioxide and ozone play roles in long-term climate, water vapor directly drives daily weather phenomena.

Multiple choice

What is the layer of the atmosphere in which weather occurs?

  1. Troposphere

  2. Exosphere

  3. Mesosphere

  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 up to about 12 kilometers. It contains most of the atmosphere's water vapor and air mass, which is why almost all weather occurs here.

Multiple choice

On which compositional layer does all life exist?

  1. crust

  2. mantle

  3. core

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

The crust is the outermost solid shell of the Earth where all known life exists, as it provides the soil, water, and air interface needed for survival. The mantle and core are located deep within the Earth under extreme temperatures and pressures where life cannot survive. The atmosphere is a layer of gases, not a compositional layer of the solid Earth.