science

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Across
  1. 3. best teacher
  2. 5. school subject
  3. 8. joint in knee
  4. 9. a wall to stop contamanation
  5. 10. plant and animal
Down
  1. 1. flames
  2. 2. earth and mars
  3. 4. carry's oxygen around the body
  4. 6. eyes
  5. 7. topic now