Isobars on a weather map are lines that connect what?

• A. Lines of equal humidity
• B. Lines of equal wind direction
• C. Lines of equal pressure
• D. Lines of equal temperature

Answer: (C)

Isobars are lines drawn on weather maps that connect locations with the same atmospheric pressure. This makes the pressure pattern visible and shows how quickly pressure changes across the map. Where the lines are close together, the pressure gradient is steep and winds tend to be stronger; where they’re spaced apart, winds are lighter. They’re not about humidity, wind direction, or temperature—that would use different kinds of lines (for example, isotherms for temperature). Isobars are typically shown using pressure units like millibars or hectopascals and help meteorologists infer wind patterns from the pressure field.