4 Geography · 4.1.5 Weather systems and world climates

4.1.5.1 Humidity and condensation: dew, frost, fog and types of clouds

Air holds an amount of water vapour that depends on its temperature; when moist air cools to its dew point, the vapour condenses on tiny nuclei or cold surfaces and appears as dew, frost, fog, mist or clouds.

  • APPSC Group 1
  • Advanced level
  • 9 min read
  • Full course

Key terms

  • water vapour
  • absolute humidity
  • relative humidity
  • specific humidity
  • dew point
  • saturation
  • latent heat
  • condensation nuclei
  • dew
  • frost
  • fog
  • mist
  • smog
  • cirrus
  • cumulus
  • stratus
  • nimbus
  • cumulonimbus
  • adiabatic lapse rate

What this note covers

  1. Core factsFoundation
  2. ExplainedStandard
  3. DeeperAdvanced
  4. Mains writingMains writing
  5. Common trapsFoundation
  6. Quick revisionFoundation

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