Social Studies

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Across
  1. 6. One of the major rivers in Iraq
  2. 8. One of the main groups of Islam
  3. 9. The other main group of Islam
  4. 10. One of the world's first writing systems
  5. 11. Large, mostly flat area, higher than nearby land
  6. 12. The river valley between the Tigris and Euphrates Rivers
Down
  1. 1. Farming
  2. 2. The outer pieces of the crust of the Earth
  3. 3. Remove salt from seawater to make fresh water
  4. 4. Surrounded on three sides by water
  5. 5. The places deep in the rock where oil is trapped
  6. 7. Canals that transport water to fields of crops