Terr/Tera/Geo

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Across
  1. 4. almost or completely surrounded by land
  2. 7. out of this world
  3. 8. the study of earth
  4. 9. a hollow stone
  5. 10. a raised, flat mound of dirt
Down
  1. 1. underground
  2. 2. a person who studies the Earth
  3. 3. the science of Earth
  4. 5. area of land
  5. 6. hard red-brown pottery