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State PSC Science & Technology — practice questions — page 2

Explore 240 free Science & Technology questions in State PSC Geography. Open each question or exercise to read its content, reference answers and available explanation.

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Science & Technology questions and exercises with answers

Showing questions 31–60 of 240.

99 per cent of the atmosphere's mass lies within what height of the earth's surface?Read the answer and worked solution →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 →

Worked practice questions

99 per cent of the atmosphere's mass lies within what height of the earth's surface?

  1. 32 km
  2. 120 km
  3. 90 km
  4. 8 km
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Correct answer: A. 32 km

1. Air is part of the earth's mass. 2. 99 per cent lies within 32 km. 3. Air is felt only when it blows as wind. _Source: syllabus Fundamentals of Physical Geography, Chapter 8, Composition and Structure of Atmosphere._

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Oxygen becomes almost negligible at what height above the surface?

  1. 50 km
  2. 120 km
  3. 32 km
  4. 90 km
Show answer and solution

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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