🔍 Key Concepts

• How magnetic variation (difference between true north and magnetic north) is normally shown on charts • The role of compass roses and any lines drawn across the chart related to magnetism • Difference between local symbols (like tables) and area‑wide graphical indications

💭 Think About

• Look at what features on a chart let you see how variation changes across a wide geographic area, not just at a single point. • Ask yourself which option describes a line or graphic that could be drawn across the chart connecting equal values of variation. • Consider whether small‑scale charts (large areas) would be more likely to use a table at one spot or a pattern that covers the entire chart.

✅ Before You Answer

• Which choice refers to lines connecting points of equal variation across the chart? • Which options describe items you’d find in or near the compass rose versus spread over the full chart? • Does any option incorrectly say that variation is not indicated—is that consistent with real charts you’ve seen?