Question

A line on a map joining places of equal rainfall is called an __________.
A)Isotherm
B)Isohyets
C)Isobars
D)Isohalines

Answer 1

Hint: Typically, it is seen on a weather chart that connects points with the same amount of precipitation over a given period of time or storm.
The key basis of these lines is the interpolation between various rain gauge stations

Complete answer:
An isohyet or isohyetal line is a line that in a given time joins points of equal rainfall on a map. An isohyetal map is considered a map with isohyets.
The method used to estimate average rainfall in a specific region is known as an isohyetal technique.

Lets see options :
Isotherm : A line on a map that connects points with the same temperature over a given duration at a given time or on average thus this option is wrong.
Isohyets : it is seen on a weather chart that connects points with the same amount of precipitation over a given period of time or storm thus this option is correct.
Isobars : A line on a map that connects points at a given time with the same atmospheric pressure or on average over a given duration thus this option is wrong too
Isohalines : Isohaline is an imaginary line on a map that links the same salinity to all points of the ocean thus this option is wrong too.

Hence, the correct answer is option (B)

Note: 1)Contour lines are also given specific names starting with "iso-"('equal ') depending on the type of the mapped vector, although the term "contour line" is most widely used in many uses.
2)In meteorology, descriptive names are most prevalent, where several maps of different variables may be displayed simultaneously.