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State PSC Physical Geography — practice questions — page 14

Explore 928 free Physical Geography questions in State PSC Geography. Open each question or exercise to read its content, reference answers and available explanation.

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Physical Geography questions and exercises with answers

Showing questions 391–420 of 928.

Oxygen becomes almost negligible at what height above the surface?Read the answer and worked solution →Carbon dioxide and water vapour are found only up to what height?Read the answer and worked solution →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 →Incoming solar radiation received by the earth is termed:Read the answer and worked solution →

Worked practice questions

Oxygen becomes almost negligible at what height above the surface?

  1. 50 km
  2. 120 km
  3. 32 km
  4. 90 km
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Correct answer: B. 120 km

1. Gas proportions change in higher layers. 2. Oxygen is negligible at 120 km. 3. Carbon dioxide and water vapour reach only 90 km. _Source: syllabus Fundamentals of Physical Geography, Chapter 8, Composition and Structure of Atmosphere._

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Carbon dioxide and water vapour are found only up to what height?

  1. 90 km
  2. 120 km
  3. 32 km
  4. 13 km
Show answer and solution

Correct answer: A. 90 km

1. Oxygen fades by 120 km. 2. Carbon dioxide and water vapour stop at 90 km. 3. Both are variable gases. _Source: syllabus Fundamentals of Physical Geography, Chapter 8, Composition and Structure of Atmosphere._

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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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