3rd grade review

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Across
  1. 2. the key element for having a plant
  2. 7. a person that collects things
  3. 8. a huge version of an elephant
  4. 10. a natural shelter for early people
  5. 13. the activity that finish the nomadism
  6. 14. the ocean on the east of Asia
  7. 15. a part of an animal used as a tool
  8. 16. the ocean between America and Africa
  9. 18. the material of a tree
Down
  1. 1. a natural element that helped people to warm spaces
  2. 3. the activity of breeding and taking care of an animal for a benefit
  3. 4. the natural cover of some animals
  4. 5. a person that constantly moves to survive
  5. 6. a hard nature element used by primitive people
  6. 9. a person that kills animals to survive
  7. 11. the smallest continent
  8. 12. the continent where we live
  9. 17. an element created by the man to do something