People of the World

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Across
  1. 2. The study of human populations
  2. 6. A system of beliefs about God or gods
  3. 7. A system of communication used by people
  4. 8. The number of people living per square mile or area
Down
  1. 1. The physical features of Earth that affect where people live
  2. 3. A group of people who share common culture, language, or ancestry
  3. 4. The average number of years a person is expected to live
  4. 5. The total number of people living in an area