Lines joining places with same mean annual rainfall are called

Lines joining places with the same mean annual rainfall are called isohyets. These lines are also known as rainfall contours or isopluvials. Isohyets are used to map and study the distribution of rainfall in a region. They are drawn by connecting points on a map that have the same average annual rainfall. By analyzing the patterns of isohyets, we can identify areas that receive high or low amounts of rainfall, as well as seasonal variations in rainfall. The term "isohyet" is derived from two Greek words: "iso," meaning equal, and "hyetos," meaning rain. Therefore, isohyets are simply lines on a map that connect places with the same amount of rainfall. In summary, isohyets are lines that connect places with the same mean annual rainfall. They are useful for studying the distribution and patterns of rainfall in a region.