Are you smarter than 5th grader?

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Across
  1. 2. hottest planet in solar system
  2. 4. shakira
  3. 7. national animal of Scotland
  4. 8. cheese state of america
  5. 10. atomic bomb
  6. 11. fastest flying insect
  7. 15. can live on land and water
  8. 16. Boston Harbour
  9. 18. group of puppies
  10. 19. thinnest layer of earth
  11. 20. tissues connecting bones to muscles
Down
  1. 1. number of hearts octopus has
  2. 3. type of poem
  3. 5. largest continent
  4. 6. snow, rain and sleet
  5. 9. capital of Bulgaria
  6. 12. statue of liberty was a gift from
  7. 13. sense organ which helps in maintaining body balance
  8. 14. first ever cloned animal
  9. 17. name place animal thing