Q. Lines joining located at equal travel time from a common centre are called ?

Explanation by: Ravi Chauhan

Isohaline - A line drawn on a map to indicate connecting points of equal salinity in the ocean. Isochrones - Lines joining located at equal travel time from a common centre, Isonomal - A line on a chartconnecting points of equal abundance values of a plant species sampled in different sections of an area. Isobronts - A line drawn through geographical points at which a given phase of thunderstorm activity occurred simultaneously.