🔍 Key Concepts

• Meridians vs parallels of latitude – understand what each one is on the globe • How the circumference of the Earth changes from the equator toward the poles • Difference between latitude (position north/south) and longitude (meridians east/west)

💭 Think About

• Picture a globe: what is the length of a parallel of latitude at the equator compared to near the poles? • If all meridians meet at the poles, what happens to the spacing between them along a small circle near the poles? • Does changing longitude (DLO) affect the physical distance between meridians at a given latitude, or does latitude affect that distance?

✅ Before You Answer

• Be clear that you are measuring along a parallel of latitude, not along a meridian • Recall that all meridians are farthest apart at the equator and approach each other toward the poles • Verify whether the distance depends mainly on latitude or on the size of the difference in longitude (DLO) itself