An isotherm is a line on a map or graph that connects points with the same temperature at a given time. These lines help visualize temperature distribution across different regions, making it easier to understand climate patterns. Isotherms are commonly used in meteorology to analyze weather conditions and predict changes. In addition to temperature, isotherms can also apply to other fields, such as chemistry and physics, where they represent constant temperature conditions during processes like phase transitions or gas behavior. Understanding isotherms is essential for studying how temperature affects various natural and scientific phenomena.