TERR, TERRA, GEO Word Study

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Across
  1. 5. Hollow stones lined with crystals inside
  2. 7. A peice of land
  3. 8. Science of the Earth
  4. 9. Hard red pottery
Down
  1. 1. Surrounded by land
  2. 2. Out of this world
  3. 3. Study of the Earth
  4. 4. Underground
  5. 5. Person who studies the Earth
  6. 6. A raised flat mound of earth