GEOGRAPHY

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Across
  1. 5. - Ring-shaped coral reef or island
  2. 10. - Large landmass on Earth's surface
  3. 13. - Deep, narrow valley with steep sides
  4. 14. - Group of islands
  5. 16. - Large underground chamber or cave
  6. 17. - High landform with steep sides
  7. 18. - Imaginary line around Earth's middle
Down
  1. 1. - Narrow passage of water connecting two larger bodies of water
  2. 2. - Body of water partially enclosed by land
  3. 3. - Slow-moving mass of ice
  4. 4. - Opening in Earth's crust that erupts lava
  5. 6. - Large body of salt water
  6. 7. - Landform surrounded by water on three sides
  7. 8. - Narrow strip of land connecting two larger land areas
  8. 9. - Arid region with little precipitation
  9. 11. - Cold, treeless region with permafrost
  10. 12. - Flat, elevated landform
  11. 13. - Point of land extending into a body of water
  12. 15. - Landform where a river meets a body of water, forming a triangular shape
  13. 19. - Large natural stream of water