science

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Across
  1. 2. fish uses it to move
  2. 5. cover birds body
  3. 8. helps us to think
  4. 10. long and pointed beak
  5. 13. butterfly smells through these
  6. 14. causes air pollution
  7. 15. protects the brain
Down
  1. 1. filter the blood to produce urine
  2. 3. helps birds to eat food
  3. 4. largest egg
  4. 6. produce own kinds
  5. 7. how long a person lives
  6. 9. cockroach breathe through these
  7. 11. birds fly with these
  8. 12. tiny openings present underside leaves