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Weather (Cambridge (CIE) IGCSE Geography)

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  • What is a Stevenson screen?

    A Stevenson screen is a wooden box used to house meteorological instruments, painted white and standing on four legs at a height of 121 cm.

  • True or False?

    The rain gauge must be placed in an open space.

    True.

    The rain gauge must be placed in an open space with a distance from the nearest object twice its height.

  • Define the term anemometer.

    An anemometer is an instrument used to measure wind speed, consisting of rotating cups on a vertical shaft.

  • What does relative humidity mean?

    Relative humidity is a measure of how much water vapour the air is holding in relation to the maximum amount it could hold at a specific temperature.

  • How is the mean daily temperature calculated?

    The mean daily temperature is calculated as follows:

    M e a n space d a i l y space t e m p e r a t u r e space equals space fraction numerator m a x i m u m space t e m p e r a t u r e space plus space m i n i m u m space t e m p e r a t u r e e over denominator 2 end fraction

  • What is a hygrometer?

    A hygrometer is an instrument used to measure humidity, consisting of wet and dry bulb thermometers.

  • True or False?

    Warm air can hold less water vapour than cold air.

    False.

    Warm air can hold more water vapor than cold air.

  • Define the term isobars.

    Isobars are lines on a map joining places with equal air pressure.

  • What is an okta?

    An okta is a unit of measurement for cloud cover, representing one-eighth of the sky.

  • State the meaning of precipitation.

    Precipitation is any form of water that falls to Earth, including rain, snow, sleet, and hail.

  • What is a barometer?

    A barometer is an instrument used to measure atmospheric pressure.

  • What is the Campbell-Stokes recorder?

    A Campbell-Stokes recorder is an instrument used to measure sunshine hours. It consists of a glass sphere that focuses sunlight to burn a trace on a special recording card.

  • True or False?

    Annual rainfall is always measured in centimetres.

    False.

    Annual rainfall is always measured in millimetres (mm).

  • Define the term diurnal temperature range.

    Diurnal temperature range is the difference between the maximum and minimum temperatures recorded in a 24-hour period.

  • What is the prevailing wind?

    The prevailing wind is the direction the wind most frequently comes from.

  • True or False?

    High-pressure systems always have a central pressure above 1013 millibar (mb).

    False.

    High-pressure systems are areas surrounded by low pressures, even if 1013 millibar (mb) is not reached.

  • Define anticyclone.

    An anticyclone is an area of high atmospheric pressure where winds tend to blow clockwise (in the Northern Hemisphere) and the weather is generally settled.

  • What is a depression in meteorology?

    A depression in meteorology is an area of low atmospheric pressure, often associated with unsettled weather and precipitation.

  • How is the mean monthly temperature calculated?

    The mean monthly temperature is calculated as follows:

    M e a n space m o n t h l y space t e m p e r a t u r e space equals space fraction numerator S u m space o f space d a i l y space m e a n space t e m p e r a t u r e s over denominator N u m b e r space o f space d a y s space i n space t h e space m o n t h end fraction space

  • What does the dominant wind mean?

    The dominant wind is the wind direction that gives the strongest winds in a given location.

  • Define wind barbs.

    Wind barbs are symbols used on weather maps to show both wind direction and speed.

  • True or False?

    Relative humidity increases as temperature rises if the amount of water vapour remains constant.

    False.

    Relative humidity decreases as temperature rises if the amount of water vapor remains constant.

  • What is a climate graph?

    A climate graph is a graphical representation showing mean monthly temperatures and precipitation rates over a 30-year period.

  • True or False?

    In a climate graph, precipitation is shown as a line graph.

    False.

    In a climate graph, precipitation is always shown as a bar graph, while temperature is shown as a line graph.

  • Define the term isohyet.

    An isohyet is a line on a map joining places with the same amount of rainfall.

  • What does a dispersion graph show?

    A dispersion graph shows the spread or grouping of data and can be used to compare sets of data or illustrate statistical values like mean, median, and extreme values.

  • State the meaning of a wind rose.

    A wind rose is a diagram showing the direction and frequency of winds at a specific location.

  • What is a synoptic chart?

    A synoptic chart is a weather map that displays meteorological data from multiple stations, showing information such as wind speed, direction, pressure patterns, and weather fronts.

  • True or False?

    Wind barbs always point in the direction the wind is blowing towards.

    False.

    Wind barbs point to the direction the wind is coming from, not where it's blowing towards.

  • Define isotherm.

    An isotherm is a line on a map joining places with the same temperature.

  • What is a choropleth isoline map?

    A choropleth isoline map is a map where areas between isolines are shaded progressively from light to dark, with the darkest shading representing the largest value.

  • How is the average monthly rainfall calculated?

    The average monthly rainfall is calculated as follows:

    A v e r a g e space m o n t h l y space r a i n f a l l space equals fraction numerator space T o t a l space a n n u a l space r a i n f a l over denominator 12 end fraction

  • What does a flag symbol represent on a wind barb?

    A flag symbol on a wind barb represents a wind speed of 50 knots.

  • True or False?

    The southern hemisphere's seasons are the same as the northern hemisphere's.

    False.

    The southern hemisphere's seasons are reversed compared to the northern hemisphere.

Previous:CoastsNext:Climate & Natural Vegetation

    1. Topic 1

      Population Dynamics

    2. Topic 2

      Migration

    3. Topic 3

      Population Structure

    4. Topic 4

      Population Density & Distribution

    5. Topic 5

      Settlements & Service Provision

    6. Topic 6

      Urban Settlements

    7. Topic 7

      Urbanisation

    1. Topic 1

      Earthquakes & Volcanoes

    2. Topic 2

      Rivers

    3. Topic 3

      Coasts

    4. Topic 4

      Weather

    5. Topic 5

      Climate & Natural Vegetation

    1. Topic 1

      Development

    2. Topic 2

      Food Production

    3. Topic 3

      Industry

    4. Topic 4

      Tourism

    5. Topic 5

      Energy

    6. Topic 6

      Water

    7. Topic 7

      Environmental Risks of Economic Activity

    1. Topic 1

      Geographical Skills

    1. Topic 1

      Fieldwork