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UPSC CDS Environment & Ecology — practice questions — page 6

Explore 446 free Environment & Ecology questions in UPSC CDS Geography. Open each question or exercise to read its content, reference answers and available explanation.

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Environment & Ecology questions and exercises with answers

Showing questions 151–180 of 446.

Which gas is transparent to incoming solar radiation but opaque to outgoing terrestrial radiation?Read the answer and worked solution →The rise in carbon dioxide in recent decades is mainly due to:Read the answer and worked solution →Ozone is found between which heights above the earth?Read the answer and worked solution →Ozone acts as a filter absorbing which rays from the sun?Read the answer and worked solution →In the warm wet tropics, water vapour may make up what share of air by volume?Read the answer and worked solution →Water vapour keeps the earth neither too cold nor too hot, acting like a:Read the answer and worked solution →Dust and salt particles act as which kind of nuclei for cloud formation?Read the answer and worked solution →Dust particles are most concentrated in which regions?Read the answer and worked solution →Based on temperature, the atmosphere is divided into how many layers?Read the answer and worked solution →The average height of the troposphere is:Read the answer and worked solution →The troposphere is thickest at the equator, reaching about:Read the answer and worked solution →In the troposphere, temperature falls by 1 degree C for every:Read the answer and worked solution →The zone separating the troposphere from the stratosphere is the:Read the answer and worked solution →The air temperature at the tropopause over the equator is about:Read the answer and worked solution →The stratosphere extends up to a height of about:Read the answer and worked solution →Which atmospheric layer contains the ozone layer?Read the answer and worked solution →The mesosphere extends up to a height of about:Read the answer and worked solution →Radio waves transmitted from the earth are reflected back by the:Read the answer and worked solution →The ionosphere lies between which heights?Read the answer and worked solution →Catch the atmospheric layersRead the answer and worked solution →Pop the weather elementsRead the answer and worked solution →Run the layer heightsRead the answer and worked solution →Slice the atmosphere's contentsRead the answer and worked solution →Troposphere or stratosphereRead the answer and worked solution →Sort the atmosphere's partsRead the answer and worked solution →Type the numberRead the answer and worked solution →Atmosphere bingoRead the answer and worked solution →Koeppen's widely used classification of climate follows which approach?Read the answer and worked solution →Koeppen found a close relationship between climate and the distribution of:Read the answer and worked solution →Koeppen's classification scheme was developed in which year?Read the answer and worked solution →

Worked practice questions

Which gas is transparent to incoming solar radiation but opaque to outgoing terrestrial radiation?

  1. Argon molecules
  2. Carbon dioxide
  3. Nitrogen gas
  4. Oxygen molecules
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Correct answer: B. Carbon dioxide

1. It absorbs part of the earth's radiation. 2. Carbon dioxide behaves this way. 3. It drives the green house effect. _Source: syllabus Fundamentals of Physical Geography, Chapter 8, Composition and Structure of Atmosphere._

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The rise in carbon dioxide in recent decades is mainly due to:

  1. Ocean evaporation
  2. Plant respiration
  3. Burning fossil fuels
  4. Volcanic eruptions
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Correct answer: C. Burning fossil fuels

1. Other gas volumes are constant. 2. Fossil fuel burning has raised carbon dioxide. 3. Air temperature has risen too. _Source: syllabus Fundamentals of Physical Geography, Chapter 8, Composition and Structure of Atmosphere._

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Ozone is found between which heights above the earth?

  1. 0 and 10 km
  2. 50 and 80 km
  3. 80 and 400 km
  4. 10 and 50 km
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Correct answer: D. 10 and 50 km

1. It sits mostly in the stratosphere. 2. Ozone lies between 10 and 50 km. 3. It filters ultra-violet rays. _Source: syllabus Fundamentals of Physical Geography, Chapter 8, Composition and Structure of Atmosphere._

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