Which of the following pairs of Isolines and its properties are correc

Which of the following pairs of Isolines and its properties are correctly matched ?

  • 1. Isonif : Snowfall
  • 2. Isohel : Sunshine
  • 3. Isohaline : Salinity
  • 4. Isohypse : Cloudiness

Select the correct answer using the code given below:

1, 2 and 3
2, 3 and 4
1 and 3 only
1, 2 and 4
This question was previously asked in
UPSC CDS-2 – 2023
The correct option is A because the pairs 1 (Isonif : Snowfall), 2 (Isohel : Sunshine), and 3 (Isohaline : Salinity) are correctly matched. Pair 4 (Isohypse : Cloudiness) is incorrectly matched.
– Isonif are isolines connecting points of equal snowfall.
– Isohel are isolines connecting points of equal duration of sunshine.
– Isohaline are isolines connecting points of equal salinity in water bodies, especially oceans.
– Isohypse are isolines connecting points of equal altitude or elevation above a given reference level (often mean sea level), also known as contour lines. Lines of equal cloudiness are called Isonephs.
Isolines are lines on a map, chart, or graph connecting points having the same value of a specified variable. They are crucial tools in cartography and various scientific fields for visualizing spatial distributions of data like temperature (Isotherms), pressure (Isobars), rainfall (Isohyets), etc.
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