🔍 Key Concepts

• Air masses and how they interact • Basic weather map terms: fronts, isobars, isotherms • What line separates regions of different temperature vs different pressure

💭 Think About

• Think about what happens at the boundary where warm air meets cold air. What weather feature forms there? • On a weather chart, which type of line is specifically used to mark the dividing line between two different air masses? • Which of these terms describes a boundary, and which just describe lines connecting equal values of something (like pressure or temperature)?

✅ Before You Answer

• Identify which answer choices are just "lines of equal value" (same pressure, same temperature, same potential). • Decide which term is used in forecasting to mark the boundary between contrasting air masses. • Eliminate any term that does NOT specifically refer to the interface between warm and cold air.