Study

The Atmosphere Revision

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  • How is air movement different in an anticyclone compared to a depression
    leading to clouds and rain.
    air sinks and moves outward clockwise; in a depression
    warm air rises
    In an anticyclone
  • How does the Coriolis Effect influence wind direction in the Northern Hemisphere
    It deflects winds to the right.
  • What protects us from harmful UV radiation in the atmosphere
    which is located in the stratosphere.
    The ozone layer
  • What instrument is used to measure atmospheric pressure
    Aneroid barometer.
  • What weather symbol represents high pressure on a weather map
    The letter 'H'.
  • How does a rain gauge work
    It collects and measures rainfall in millimetres.
  • In which layer of the atmosphere does weather occur
    Troposphere.
  • What direction do prevailing winds in Ireland come from
    South-west (they are south-westerly winds).
  • Name and describe one type of rainfall experienced in Ireland
    causing it to cool and condense (e.g.
    Relief rainfall – moist air is forced over mountains
    in Kerry or Donegal).
  • What causes wind to form
    and cold air sinks creating high pressure; air moves from high to low pressure.
    Wind forms when warm air rises creating low pressure
  • What is an anticyclone and what kind of weather does it usually bring
    calm
    bringing dry
    and clear weather.
    An anticyclone is an area of high pressure with descending air
  • What is the atmosphere and what are its two main functions
    The atmosphere is a thin layer of gases around the Earth. It keeps the planet warm and protects us from harmful sun rays.
  • Why is a Stevenson screen used in weather stations
    To protect instruments from direct sunlight and rain while allowing air to circulate for accurate readings.
  • What role does the North Atlantic Drift play in Ireland’s climate
    It warms the Irish coast by transferring heat from the ocean.
  • Which instrument records sunshine hours
    Campbell-Stokes sunshine recorder.
  • Name the three main gases in the Earth's atmosphere and give their percentages
    1% Other gases.
    78% Nitrogen
    21% Oxygen
  • List three types of clouds associated with the passing of a depression
    stratus
    Cirrus
    and cumulus clouds.
  • What does a wet and dry bulb thermometer measure
    Humidity (relative humidity).
  • Describe what happens to temperature as you go higher in the troposphere
    The temperature drops as you go higher.
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