Our earth

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Across
  1. 4. explorers guide
  2. 5. nickname of the earth
  3. 7. model of the earth
  4. 8. half of the earth
  5. 10. Blue planet
  6. 12. evidence of past life
  7. 13. table land
Down
  1. 1. turn waste into usable materials
  2. 2. Earth's protective layer
  3. 3. Dense wet woodland
  4. 6. fertile land in the desert
  5. 9. Earth's mid line
  6. 11. arid land