This resource focuses on analyzing global population density maps, particularly the concept of ecumene, which is the portion of Earth's surface permanently occupied by human settlements. Students will explore the relationship between environmental factors, such as water access, and settlement patterns. The lesson involves activities that encourage students to observe high-density regions, consider the physical features of sparse areas, and pose questions about uninhabited spaces. A case study compares the Nile River Delta, which supports dense settlement due to its fertile land, against the Sahara Desert, known for its arid conditions. Additionally, students will engage in a CER (Claim, Evidence, Reasoning) analysis to understand the significant population concentration in Egypt's limited arable land.