What term is used to describe a line connecting points of equal atmospheric pressure?

The correct term for a line connecting points of equal atmospheric pressure is "isobar." In meteorology, isobars are crucial for weather mapping, as they help visualize high and low-pressure systems. Analyzing isobars allows meteorologists to determine wind patterns and potential weather changes. When isobars are closely spaced, it indicates a steep pressure gradient, often leading to stronger winds. Recognizing isobars is essential for understanding weather phenomena and their implications for the environment and human activities.

The other options refer to different concepts: "isotherms" connect points of equal temperature, "isohyets" connect points of equal precipitation, and "contouring" typically refers to drawing lines on a map to connect points of equal value for various data sets, not specifically atmospheric pressure.